Q10 of 40 Page 210

The donations given to an orphanage home by the students of different classes of a secondary school are given below.

Find the mean, median and mode of the data.


We have



For mean:


Mean is given by



⇒


⇒ Mean = 11.25


For median:


Total observation, N = 80


Since, N is even (that is, 80 is even),



⇒


&


⇒


Cumulative frequencies = 50 is just greater than 40 and 41.


And cumulative frequencies, 50 falls in donation by each student, 10.


⇒ Median = 10


For mode:


Mode is the value having highest frequency in the data.


From the table given above, 20 is the greatest frequency in the given frequencies.


Thus, the corresponding value in ‘donation by each student’, 10 is the mode.


⇒ Mode = 10


More from this chapter

All 40 →
7

Centuries scored and number of cricketers in the world are given below.

Find the mean, median and mode of the given data.


 8

On the occasion of New year’s day a sweet stall prepared sweet packets. Number of sweet packets and cost of each packet are given as follows.





















Cost of packet (in ₹)



₹25



₹50



₹75



₹100



₹125



₹150



No of packets



20



36



32



29



22



11



Find the mean, median and mode of the data.


 9

The mean (average) weight of three students is 40 kg. One of the students Ranga weighs 46 kg. The other two students, Rahim and Reshma have the same weight. Find Rahims weight.

 11

There are four unknown numbers. The mean of the first two numbers is 4 and the mean of the first three is 9. The mean of all four number is 15, if one of the four number is 2 find the other numbers.