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 measured altogether in the experiment?
a 25
b 40
c 90
d 100

Explanation:

Step1: Identify frequencies from histogram

From the histogram, the frequencies for lengths 20 - 21, 21 - 22, 22 - 23, 23 - 24, 24 - 25 are 8, 17, 39, 25, 11 respectively.

Step2: Sum up the frequencies

$8 + 17+39 + 25+11=100$

Answer:

D. 100