Question

How many ponds had $20-39$ ducks?

• A. $25$
• B. $30$
• C. $20$
• D. $15$

Answer 1

The correct option is C $20$

From the histogram, the class width of number of ducks:

$0-19=30$ number of ponds.

$20-39=20$ number of ponds.

$40-59=25$ number of ponds.

$60-79=10$ number of ponds.

$80-99=20$ number of ponds.

$100-119=15$ number of ponds.

Therefore, $20$ ponds had $20-39$ number of ducks.

Hence, option $C$ is correct.