Math question

If it is true that 6 n 10, which of the following must be true?

1) n < 8
2) n = 6
3) n > 8
4) -10 < n < 7
5) none of the above

Permutation and Combination problem

Can anyone help to solve this problem?


A 3-people committee is to be selected from four couples. If the committee cannot contain a couple at the same time, how many such committees are possible?
A) 21
(B) 35
(C) 28
(D) 24
(E) 32

OA is E

Math problem

Can anyone help to solve this problem? Is X close to 10^(-2) or 10^(-3)? (1) x is closer to 10^-4 than to 10^-1. (2) x is closer to 10^-3 than to 10^-1. A. Statement (1) ALONE is sufficient but Statement (2) ALONE is not sufficient. B. Statement (2) ALONE is sufficient but Statement (1) ALONE is not...

Probability question

Can someone help me solve this problem?

If 2 numbers are to be chosen at random from 1, 2, 3, ...10, without replacement, what is the probability that the product of two selected numbers is divisible by 10?
(A) 1/5
(B) 1/3
(C) 4/15
(D) 13/45
(E) 14/45

Thanks,
Priya

D is not the answer. C is the answer. Can someone explain the steps to get the answer?

Math Problem - Help needed to solve

Can anyone help me solve this problem? As the figure above shows, two circles lie on a line and tangent to each other. If the radius of two circles are 2r and r, respectively, in terms of r, AB=? (A) 5r/2 (B) 8r/3 (C) 2*2^1/2*r (D) 3r (E) 2*3^1/2*r Pls find the figure in the attached doc. Thanks for...