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Chance of winning election = 40% Chance of selecting y or z if she won= (100-60)=40% Since she selects randomly between y and z, chance of selecting z if she wins = 40/2= 20% So, overall chance of selecting z= 40%*20%= 8% ________________________________________ Shahrukh Moin Khan QA Mentor at Break...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 11:03 pm- Forum: Problem Solving
- Topic: A polling company reports that there is a 40% chance that
- Replies: 4
- Views: 807
SP of one dozen= 0.9*4= 3.6
Profit per dozen= 3.6-2.8= 0.8
So, for 5 dozen= 0.8*5=4
________________________________________
Shahrukh Moin Khan
QA Mentor at Breakspace
https://www.mbabreakspace.com
PGDM: IIM Calcutta
B.Tech IIT Roorkee
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 10:59 pm- Forum: Problem Solving
- Topic: GMAT Official Guide 2019 A retailer purchased eggs
- Replies: 3
- Views: 1325
Time taken by train to cross a pole = Length of train/speed of train Time taken by train to cross a platform= Length of train + Length of platform/speed of train So, t=L/S 3t= L+x/S Dividing the two equations 3=L+x/L So, x=2L ________________________________________ Shahrukh Moin Khan QA Mentor at B...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 10:42 pm- Forum: Problem Solving
- Topic: A train of length L is traveling at a constant velocity and
- Replies: 2
- Views: 939
Let CP be x So, MP becomes 1.4x Discount is 20% So, Selling Price is 80% of Marked Price => SP= 0.8*1.4x= 1.12x So, clearly profit is 1.12x-x/x*100= 12% ________________________________________ Shahrukh Moin Khan QA Mentor at Breakspace https://www.mbabreakspace.com PGDM: IIM Calcutta B.Tech IIT Roo...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 10:37 pm- Forum: Problem Solving
- Topic: The marked price of a laptop is 40% higher than the cost
- Replies: 3
- Views: 767
x has 8 elements y has 8 elements which are 4 more than each element and 8 elements which are 4 less than each element, so in total 16 elements So y has 8 more elements than x ________________________________________ Shahrukh Moin Khan QA Mentor at Breakspace https://www.mbabreakspace.com PGDM: IIM ...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 10:31 pm- Forum: Problem Solving
- Topic: GMAT Official Guide 2019 Set X consists of eight consecutive
- Replies: 3
- Views: 1982
Repost
P leaves 1 as remainder when divided by 9, it means p is of 9x+1 form where x is a non-negative integer It can be odd or even depending on value of x, so I and II can't be true always. We can write P as 3*3x +1 This clearly Shows that III is always true and Z is of 3x form. _________________________...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 10:21 pm- Forum: Problem Solving
- Topic: If positive integer p divided by 9 leaves a remainder of 1
- Replies: 3
- Views: 1070
For mid term grade to be minimum, her final grade should be maximum, as her semester grades are fixed. So, max value value of her final grade will be 100 Now, let her mid term grade be x 0.75*100 + 0.25* x= 88 On solving, x= 52% ________________________________________ Shahrukh Moin Khan QA Mentor a...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 3:46 am- Forum: Problem Solving
- Topic: In a particular course, only two grades are given all
- Replies: 3
- Views: 679
Since m and n are in ratio 3:4, let us assume them to be 3x and 4x So, now hcf of 3x and 4x is obviously x Formula is hcf * lcm= product of two number x*120= 3x*4x so x=10 ________________________________________ Shahrukh Moin Khan QA Mentor at Breakspace https://www.mbabreakspace.com PGDM: IIM Calc...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 3:39 am- Forum: Problem Solving
- Topic: If the least common multiple of positive integer
- Replies: 3
- Views: 1021
Since the number x gives remainder 3 for both 11 and 19, we can say that x-3 is multiple of 11 and 19 both.
So, y which we get when we divide x by 11 is same when we divide x-3 by 11
=> y is a multiple of 19, hence remainder will be 0
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 3:31 am- Forum: Problem Solving
- Topic: When the positive integer x is divided by 11
- Replies: 5
- Views: 1039
Since x is directly proportional to y^2 and inversely proportional to z x=(ky^2)/z, where k is a constant Now, if z becomes half, then to keep x unchanged, y^2 should also become 1/2 This means y will become 1/sqrt(2) times of y Now, % change in y= (y-(1/sqrt(2)*y))/y * 100 Which approximately is 30...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 3:11 am- Forum: Problem Solving
- Topic: In a certain industry, production index x is directly
- Replies: 3
- Views: 759
Let one side of rectangle be x then other side becomes (p/2)-x .................(because p= 2* sum of both sides) Now, using pythagorus theorem, d^2= x^2 + ((p/2)-x)^2 Now solve for the quadratic equation for x we get, x= (p+sqrt(8d^2-p^2))/4 and (p-sqrt(8d^2-p^2))/4 If we take x= (p+sqrt(8d^2-p^2))...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 3:00 am- Forum: Problem Solving
- Topic: If the diagonal of rectangle Z is d, and the perimeter
- Replies: 3
- Views: 893
Out of all the possible lock codes, 1 will come at 1000th position in 3! ways Similarly 2,3 and 4 will also come 3! times each. Similarly 1 will come at 100th position in 3! ways and 2,3 and 4 will also come 3! times each. Similarly 1 will come at 10th position in 3! ways and 2,3 and 4 will also com...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 2:43 am- Forum: Problem Solving
- Topic: We make 4 digit codes and each digit of the code form from
- Replies: 2
- Views: 660
Total bill= 200g + 200m
=200(g+m) cents
In dollars which is 2(m+g)
________________________________________
Shahrukh Moin Khan
QA Mentor at Breakspace
https://www.mbabreakspace.com
PGDM: IIM Calcutta
B.Tech IIT Roorkee
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 2:30 am- Forum: Problem Solving
- Topic: It costs g cents per mile for gasoline and m cents
- Replies: 4
- Views: 965
Since the question asks for the closest answer, let us 1/9=1/8
As it will solve the question easily, it becomes: 1/(1/2)=2
________________________________________
Shahrukh Moin Khan
QA Mentor at Breakspace
https://www.mbabreakspace.com
PGDM: IIM Calcutta
B.Tech IIT Roorkee
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 2:27 am- Forum: Problem Solving
- Topic: GMAT Official Guide 2019 The value of the above
- Replies: 4
- Views: 1092
Average= Sum of all bills/7 Sum of all bills = 511 Average = 511/7= 73 Alternatively, If we assume average to 70 and just look at the distortions and then just edit the answer: So it becomes(+4-1-6+9-6+14+7)= 21 21/7=3 70+3=73 ________________________________________ Shahrukh Moin Khan QA Mentor at ...
- by Shahrukh_mbabreakspace
Wed Jul 04, 2018 2:21 am- Forum: Problem Solving
- Topic: GMAT Official Guide 2019 Over the past 7 weeks
- Replies: 4
- Views: 2262