Hello, saunak!

Suppose 150 people joined 3 different communities in Google+.

The communities are: Mathematics, Hot Peppers and Cooking.

Here is what is known:

1. 90 joined Mathematics community

2. 50 joined Hot Peppers community

3. 70 joined Cooking community

4. 15 joined both Mathematics and Cooking

5. 12 joined both Hot Peppers and Cooking

6. 10 joined all three communities.

How many joined Mathematics and Hot Peppers only?

Let = number in Math and Peppers only.

Fill in the Venn diagram.

It should look like this . . .

The total of the numbers is 150.Code:o o o o o o o o o o o Math o Peppers o o o o o x o 75-x o o 38-x o o o o o o o o o o o o o 10 o o o o o o o o 5 o 2 o o o o o o o o o o o o o o o 53 o o o Cooking o o o o o o

. . . . . .

Therefore: .