Question

(D)
6.
A bag contains 3 red, 5 black and 7 white balls. A ball is drawn from the
bag at random. The probability that the ball drawn is not black, is
1
(A)
3
9
(B)
15
5
(C)
10
2
(D)
3​

Answer 1

Answer:

15.probability in this question..

Answer 2

Step-by-step explanation:

Let,red balls be r1,r2 and r3 black balls be b1,b2,b3,b4,by and white ball be w1,w2,w3,w4,w5,w6 and w7

Therefore,the sample space

S={r1,r2,r3,b1,b2,b3,b4,b5,w1,w2,w3,w4,w5,w6,w7}

n(s)=15

Let event A be the ball drawn is not a black.

A={r1,r2,r3,w1,w2,w3,w4,w5,w6,w6,w7}

n(A)=10

P(A)=n(A)/n(S)

=10/15=2/3