Question

the total number of centimeters of rainfall for the past 4 years was 65, 77, 53, and 44. suppose the mean for 5 years was 66 centimeters. how many centimeters of rain fell the fifth year?
_____ cm

Explanation:

Step1: Find total 5-year rainfall

Mean formula: $\text{Total} = \text{Mean} \times \text{Number of years}$
$\text{Total for 5 years} = 66 \times 5 = 330$ cm

Step2: Calculate sum of first 4 years

Add the given rainfall values:
$65 + 77 + 53 + 44 = 239$ cm

Step3: Solve for 5th year rainfall

Subtract 4-year total from 5-year total:
$330 - 239 = 91$ cm

Answer:

91 cm