Question

A box contain 90 dices which are number from 1 to 90. If one dice is drawn at random from the box, find the probability that it bears :-
(1):- a to-digit number.
(2):- a perfect square number.
(3):- a number divisible by 5.

Answer 1

Answer:

1:-81/90

=9/10

2:-9/90

=1/10

Step-by-step explanation:

3:-18/90

=1/5

Answer 2

Answer:

1) Favourable outcome:81

Total no. of outcome: 90

Probability of getting two digit no.: 81/90=9/10

2) Favourable outcomes:9

Total no. of outcimes: 90

Probability of getting perfect sq: 9/90=1/10

3) Favourable outcomes:18

Total no.of outcomes:90

Probability of getting a no. divisible by 5: 18/90=2/10=1/5