prasadrg wrote:

Mr. Yutaro’s class contains 5boys and 11 girls. If two students are chosen, one at a time, from the class, what is

the probability that a boy and a girl are chosen?

A. 9/48

B. 9/20

C. 11/24

D. 27/48

E. 13/16

Probability of a boy being chosen first, then a girl:

5/16 * 11/15

Probability of a girl being chosen first, then a boy:

11/16 * 5/15

Probability of a boy and a girl being chosen:

(5*11+5*11) / (15*16)

=11+11/3*16

=22/48

=11/24, so C.

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Andrew

http://www.RenoRaters.com