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A person put 1000 dollars in a bank at a compound interest 6 years ago. What percentage of the initial sum is the interest if after the first three years the accrued interest amounted to 19% of the initial sum? A) 38% B) 42% C) 19% D) 40% E) 50% from diff math problem doc, oa coming when ppl respon...
Sequence A and B. a1=1, b1=k. an=b(n-1)-a(n-1) bn=b(n-1)+a(n-1). What is a4=?
from difficult math problems doc, oa coming after people answer with questions
(x+y)30/100 = x*40/100 + y*25/100
30x + 30y = 40x + 25y
y = 2x or y/x = 2/1 or y:x = 2:1 hence x = 33 1/3%
Seed mixture X is 40 percent ryegrass and 60 percent bluegrass by weight; seed mixture Y is 25 percent ryegrass and 75 percent fescue. If a mixture of X and Y contains 30 percent ryegrass, what percent of the weight of this mixture is X ? (A) 10% (B) 33 1/3% (C) 40% (D) 50% (E) 66 2/3% from diff ma...
OA: Number of integers that divide 3: the range is 100-150 Relevant to this case, we take 102 - 150 (since 102 is the first to div 3) 102 = 34*3 150= 50*3, so we have 50-34+1 = 17 multiples of 3 For multiples of 5, 100=5*20 150=5*30 30-20+1 =11 Now we have a total of 27 integers, but we double count...
How many integers between 100 and 150, inclusive can be evenly divided by neither 3 nor 5?
from diff math doc, ans coming after ppl respond with explanations
Chance of drawing a blue on the first draw = 2/8, so chance of not drawing a blue on the first draw is 6/8
similarly chance of not drawing blue on second draw = 5/7
Therefore probability of not drawing blue in 2 draws = 6/8*5/7 = 15/28
A certain deck of cards contains 2 blue cards, 2 red cards, 2 yellow cards, and 2 green cards. If two cards are randomly drawn from the deck, what is the probability that they will both are not blue? A. 15/28 B. 1/4 C. 9/16 D. 1/32 E. 1/16 oa coming after some people respond, from diff math doc
right triangle with sides x<y<z and area of 1 => z = hypotenuse and xy/2 = 1
i.e xy = 2
If x were equal to y, we would have had xy = y^2 = 2. And y = root2
But, x<y and so y>root2.
A certain right triangle has sides of length x, y, and z, where x < y < z. If the area of this triangular region is 1, which of the following indicates all of the possible values of y ? A. y > ROOT2 B. ROOT3/2 < y < ROOT2 C. ROOT2/3 < y < ROOT3/2 D. ROOT3/4 < y < ROOT2/3 E. y < ROOT3/4 from diff ma...
oa: there are actually 20 ways to interchange the letters, namely, the first letter could be one of 5, and the other letter could be one of 4 left. So total pairs by product rule = 20. Now, there are two cases when it wouldn’t change the name. First, keeping them all the same. Second, interchanging ...
My name is AJEET. But my son accidentally types the name by interchanging a pair of letters in my name. What is the probability that despite this interchange, the name remains unchanged?
oa coming after some people respond w/explanations. from diff math doc
out of 8 people one team can be formed in 8c2 ways.
The answer is 105. Divide 2520 by 4! to remove the multiples ( for example: (A,B) is same as ( B,A) )