Question

80% of the students in a class of 35 took part in the sports day mass drill. How many students did not participate in the drill?​

Answer 1

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4% i think

Answer 2

Answer:

7

Step-by-step explanation:

This since from probability, students that did not participate in the drill is a "complimentary event" of the event that students did participate.

Hence we can work out the percentage of this complimentary event:

100% - 80% = 20%

Hence we can calculate the number of students that did not participate:

$\frac{20}{100} \cdot 35 = 7$