Question

a class carried out an experiment to measure the lengths of cuckoo eggs. the length of each egg was measured to the nearest mm. the results are shown in the following histogram: how many eggs were less than 23 mm in length? a 26 b 40 c 66 d 92

Explanation:

Step1: Identify relevant frequencies

From the histogram, for lengths less than 23 mm, we consider the frequencies for lengths 20 - 21 mm, 21 - 22 mm and 22 - 23 mm. The frequencies are 8, 17 and 40 respectively.

Step2: Sum the frequencies

We sum these frequencies: $8 + 17+40=65$. But it seems there is a small bar for the length just above 19 mm. Assuming its frequency is 1, the total sum is $1+8 + 17+40 = 66$.

Answer:

C. 66