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A box contains 5 red and k blue balls. A ball is selected at...

A box contains 5 red and k blue balls. A ball is selected at random from the box. If the probability of selecting a blue ball is 23, find the value of k

A.

5

B.

6

C.

8

D.

10

Correct answer is D

p(blue)=no of blue ballstotal no of balls

= 23=kk+5

3k=2(k+5)3k=2k+10

3k2k=k=10