Q. 104.9( 7 Votes )
Candidates of four schools appear in a mathematics test. The data were as follows:
If the average score of the candidates of all the four school is 66, find the number of candidates that appeared from school III.
Answer :
Let no. of students appeared from school III = x
Given, Average score of all schools = 66
= 66
= 66
= 66
= 66
10340 – 9768 = 66x – 55x
11x = 572
x = 
= 52
Therefore, no. of candidates appeared from school (III) are 52
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PREVIOUSFind the mean of the following distribution.NEXTFive coins were simultaneously tossed 1000 times and at each toss the number of heads were observed. The number of tosses during which 0, 1, 2, 3, 4 and 5 heads were obtained are shown in the table below. Find the mean number of heads per toss.
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