Question

One bag contains 40 balls .Some of them are blue, red and the rest are black

The probability of drawing red balls is 11/20

Blue is 1/5

(1) Find the number of blue balls

(2) What is the probability of getting a blue ball?​

Answer 1

GIVEN

Probability of drawing red balls : 11 out of 20

Probability of drawing blue balls : 1 out of 5

SOLUTION (1) No. of blue balls -

If 1 out of 5 ball is blue then out of 40 balls ___ will be blue.

NOW,

1 out of 5 balls

then,

out of 40 balls

5 × 8 is 40

5 × 8 is 40

1 × 8 is 8

There are 8 balls,

SOLUTION (2) Probability of getting a blue ball is already answered in (1) and here is your answer -

4/20

HOPE IT WILL HELP YOU...