Find the number of students working $19$ hours or less.

40

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50

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90

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Solution

The correct option is C $90$
The number of students working $19$ hours or less will contain the group which works for $0 - 9$ hours as well as $10 - 19$ hours.
So, total students $= 40 + 50 = 90$ .

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Similar questions

Q. The relative frequency of students working

9

hours or less is

In a school there are 10 periods per day of 40 minutes each. Students want to reduce the number of periods but the principal doesn't want to reduce the number of working hours. How can the principal to reduce the number of periods to 8 without changing the total working hours?

In a college, there are 10 periods per day each of 40 minutes. Students were shouting to reduce the number of periods but the principal does not want to reduce the working hours. How will you help the principal to reduce the number of periods to 8 without changing the total working hours?

The marks obtained by $40$ students of a class are given below :
$80, 10, 30, 70, 60, 50, 50, 40, 40, 20, 40, 90, 50, 30, 70,$
$10, 60, 50, 20, 70, 70, 30, 80, 40, 20, 80, 90,$ $50, 80,$
$60, 70, 40, 50, 60, 90, 60, 40, 40, 60$ , and $60$

How many numbers are less than

35

In a college there are 10 periods per day each of 40 minutes. The students were protesting to reduce the number of periods but the Principal did not want to reduce the working hours. What should be the working hours of each period if Principal reduces the number of periods to 8?

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Find the number of students working 19 hours or less.

The correct option is C 90The number of students working 19 hours or less will contain the group which works for 0−9 hours as well as 10−19 hours.So, total students =40+50=90.

Find the number of students working $19$ hours or less.

The correct option is C $90$
The number of students working $19$ hours or less will contain the group which works for $0 - 9$ hours as well as $10 - 19$ hours.
So, total students $= 40 + 50 = 90$ .