chetan2u wrote:

Bunuel wrote:

GMAT CLUB TESTS' FRESH QUESTION:

Minimum of how many people are needed to have the probability of more than 1/2 that at lease one of them was born on either on Monday or on Tuesday?

A. 2

B. 3

C. 4

D. 5

E. 6

Say there are only 2 person..

Prob = 2/7+2/7-2/7*2/7=4/7-4/49=24/49<1/2

Ans will be 3 because with 2, we had answer almost close to 1/2

No calculations required therefore

B[/quote

Hi Experts,can you please explain Prob = 2/7+2/7-2/7*2/7 .

I am not able to understand this.

_________________

Thanks,

Ankit

Target Score:730+

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