The following histogram shows the frequency distribution of teaching experiences of 30 teachers in various schools.

Among the choices, find the number of teachers who have teaching experience of 10 to 20 years?

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answer is C.

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Detailed Solution

The information of the teacher's teaching experience is provided.
Question Image

We have to find the number of teachers who have teaching experience of 10 to 20 years.
Observe in the given histogram that the number of teachers having experience between

10

and

20

years, is,
Number of teachers having experience between 10 and 20 years = Number of teachers having experience between 10 and 15 years + Number of teachers having experience between 15 and 20 years
= 7 + 2
= 9.
The number of teachers who have teaching experience of 10 to 20 years is 9.
Hence, option 3) is correct.

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