Question

A bag contains 11 blocks numbered from 1 to 11. two blocks are selected from the bag at the same time .

let event E= the two numbers are not even.

how many outcomes are in the complement of E?

a) 10
b) 20
c) 70
d) 90

Answer 1

the answer is ten im possitive

Answer 2

a) 10

Explanation:

If a bag contains 11 blocks numbered from 1 to 11.

The numbers are 1,2,3,4,5,6,7,8,9,10,11

So, we pick out even numbers. This is either 2,4,6,8 or 10

second even number will also be- 2,4,6,8 or 10

lets look at the possible combinations such as

2 and 4, 2 and 6, 2 and 8, 2 and 10, 4 and 6, 4 and 8, 4 and 10, 6 and 8, 6 and 10, 8 and 10

answer is 10 , which means that there are 10 ways to pick two blocks from the bag