Question

15.
A bag contains 20 balls of different colours. The probability
of drawing a black ball is 4/5 then number of black balls in
the bagis:

(A)14
(B) 15
(C) 16
(D) 20​

Answer 1

Step-by-step explanation:

x/15+x=3×15/15+x

x=3×15

x=45

Answer 2

Correct Ans

16

20 - 4

= 16