Question

Cards numbered from 2 to 25 are put in a box and mixed thoroughly. One card is drawn at random. Find the probability.
1) an odd number.
2) not a prime number.
3) a perfect square.
4) a number divisible by 2 and 3​

Answer 1

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Answer 2

Answer:

❄️ Question :

Cards numbered from 2 to 25 are put in a box and mixed thoroughly. One card is drawn at random. Find the probability.

1) an odd number.

2) not a prime number.

3) a perfect square.

4) a number divisible by 2 and 3

❄️Answer :

Total outcomes = 25 - 2 cards

• 23 cards

Favourable outcomes = 2 , 3 , 4 , 5 , 6 , 7 , 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23

Find the probability :

1) an odd number :

• Odd numbers = 3 , 5 , 7 , 9 , 11 , 13 , 15 , 17 , 19 , 21 , 23
• P(odd numbers) = 11/23

2) not a prime number :

• Prime numbers = 2 , 3 , 5 , 7 , 11 , 13 , 17 , 19 , 23
• Non prime numbers = 4 , 6 , 8 , 10 , 12 , 14 , 15 , 16 , 18 , 20 , 21 , 22
• P ( not a prime number ) = 12/23