Question

What is the total number of children entered in to the library between $0-30$ hours?

• A. $45$
• B. $55$
• C. $100$
• D. $115$

Answer 1

The correct option is D $115$

From the histogram,

The number of children entered during $0-10$ hours $=45$

The number of children entered during $10-20$ hours $=55$

The number of children entered during $20-30$ hours $=15$

The number of children entered during $30-40$ hours $=25$

The number of children entered during $40-50$ hours $=85$

The number of children entered during $50-60$ hours $=10$.

Therefore, the total number of children during $0-30$ hours $=45+55+15=115$.

Hence, option $D$ is correct.