Question

here are the test scores for 15 students in mr. ts class. 86, 76, 47, 51, 67, 58, 83, 87, 77, 88, 82, 84, 65, 34, 71. what is the percentage of these test scores that are less than 71?

Explanation:

Step1: Count scores less than 71

Count the number of scores less than 71. The scores are 47, 51, 67, 58, 65, 34. So there are 6 scores less than 71.

Step2: Calculate the percentage

The formula for percentage is $\frac{\text{number of scores less than 71}}{\text{total number of scores}}\times100\%$. The total number of scores is 15. So the percentage is $\frac{6}{15}\times 100\%$.
$\frac{6}{15}\times100\% = 0.4\times100\%=40\%$

Answer:

40%