In a committee, 50 people speak Hindi, 20 speak English and 10 speak both Hindi and English. How many speak at least one of these two languages?

To solve this problem, we need to find out how many people speak at least one of the two languages: Hindi or English.

We are given the following information:

50 people speak Hindi.
20 people speak English.
10 people speak both Hindi and English.
To find the number of people who speak at least one language, we use the principle of inclusion and exclusion:

Formula: Number of people who speak at least one language = (People who speak Hindi) + (People who speak English) - (People who speak both Hindi and English).

Let's apply the numbers:

People who speak Hindi = 50
People who speak English = 20
People who speak both languages = 10
Now substitute these values into the formula:

Number of people who speak at least one language = 50 + 20 - 10 = 60.

So, 60 people speak at least one of these two languages.