Question

In primary school,the parents were asked about the number of hours they spend per day in helping their children to do homework. There were 90 parents who helped for 1/2 hour to 1 1/2 hours.the distribution of parents according to the time for which,they said they helped is given in the adjoining figure; 20% helped for more than 1 1/2 hours per day; 30% helped for 1/2 hour to 1 1/2 hours;50% did not help at all. Using this answer the following: (i) how many parents were surveyed? (ii) how many said they did not help? (iii) how many said that they helped for more than 1 1/2 hours?

Answer 1

300parents
150said they do not help
60 say that they help more than11/2hrs