Browse by Stream
QnA
Home
QnA
Go To Your Study Dashboard

Get Answers to all your Questions

header-bg qa
  • Home
  • NCERT
  • In a primary school, the parents were asked about the number of hours they spend per day in helping their children to do homework. How many said that they helped for more than 1 and half hours?

In a 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   \frac{1}{2}  hour to   1\frac{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\frac{1}{2}  hours; 30% helped for \frac{1}{2}  hour to 1\frac{1}{2}  hours; 50 % did not help at all. Using this, answer the following :How many said that they helped for more than  1\frac{1}{2}   hours?

Answers (1)

best_answer

Let the number of parents surveyed be X.

30% of them helped for for   \frac{1}{2}  hour to 1\frac{1}{2}   hours.

In total, there were 90 such parents.

\therefore 30% of X = 90

\Rightarrow \frac{30}{100}\times X = 90 \\ \Rightarrow X = 90\times100 /30 = 300

Therefore, There were total of 300 parents who were surveyed.

from the first question number of parents surveyed  X = 300

Given, 20% helped for more than   1\frac{1}{2}   hours.

Therefore, number of such parents = 20% of 300 = 2 x 30 = 60.

Posted by

HARSH KANKARIA

View full answer

Similar Questions

Trending Articles/News

anam-khan

NVS LEST 2025 application correction deadline today at navodaya.gov.in; editable fields
anam-khan

NVS 2025 application correction window for Class 9, 11 admissions opens at navodaya.gov.in
anam-khan

NVS Class 9, 11 Admission 2025: LEST registration last date extended again; apply by November 26

Latest Question