Question

On a primary school parents were asked the number of hours they spend to help their children in home work there were 90 parents who helped 1/2 hour to 1 1/2 hours . 20% of parents helped more than 1 1/2 hours 30% said that they helped for 1/2 hour to 1 1/2 hours per day the rest 50% did not help at all
(i)how many parents were surveyed
(ii)how many said they did not help

Answer 1

50 parents were surveyed

20 said they did not help

plz mark brainly

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Answer 2

Answer:

Step-by-step explanation:

Let x be the number of parents surveyed.

30% of x = 90

$\frac{30}{100}*x=90\\\\x=90*\frac{100}{30}=3*100=300$

Total number of parents surveyed = 300

Number of parents who did not help = 50%of 300

$=\frac{50}{100}*300=50*3=150$

Number of parents who did not help = 150