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

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

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Anna 3 weeks 2021-12-27T09:27:06+00:00 2 Answers 0 views 0

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    0
    2021-12-27T09:29:02+00:00

    50 parents were surveyed

    20 said they did not help

    plz mark brainly

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    0
    2021-12-27T09:29:05+00:00

    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

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