Question

2. Cards with numbers 1 to 9 are kept in one box. Cards with numbers 4 to 9 are kept in another box. A card each is taken from both the boxes after closing the eyes. a) What is the probability of getting 18 as the sum of the numbers on the cards? b) What is the probability of getting 9 as the sum of the numbers on the cards?​

Answer 1

Answer:

1,4 1,5 1,6 1,7 1,8 1,9

2,4 2,5 2,6 2,7 2,8 2,9

3,4 3,5 3,6 3,7 3,8 3,9

4,4 4,5 4,6 4,7 4,8 4,9

5,4 5,5 5,6 5,7 5,8 5,9

6,4 6,5 6,6 6,7 6,8 6,9

7,4 7,5 7,6 7,7 7,8 7,9

8,4 8,5 8,6 8,7 8,8 8,9

9,4 9,5 9,6 9,7 9,8 9,9

a) probability of getting 18 as the sum of numbers on 2 cards= 1/54

b) probability of getting 9 as sum of number on cards=5/54