Question

A box contains 20 balls bearing numbers 1, 2, 3, 4,
...., 20. A ball is drawn at random from the box. What
is the probability of getting a perfect cube

Answer 1

Answer:

Since, total balls = 20

(i) odd numbers from 1 to 20 are:

1,3,5,7,9,11,13,15,17,19

no. of balls bearing odd numbers = 10

∴ favorable outcomes= 10

∴ probability =

20

10

=

2

1

Answer 2

Answer:

1/10 OR 0.1

Step-by-step explanation:

TOTAL NO. OF BALLS = 20

NO OF BALLS (PERFECT CUBE) = 2

(i.e: 1, 8)

Probability = NO OF BALLS (PERFECT CUBE) / TOTAL NO. OF BALLS

= 2/20 = 1/10