33. The given table gives the enrolment in
Higher Secondary School in 1978. Find the
average enrolment in H.S. School,
Enrolment Number of schools
20-39
526
40-59
620
60-79
674
80-99
717
100-119
681
120-139
612
140-159
540
160-179
517
180-199
552
Total
5439
5
.
Answers
111 is Average Enrolment in H.S. School
Step-by-step explanation:
Enrolment Schools Mean (mean - 109.5)/20 school*
20-39 526 29.5 -4 -1104
40-59 620 49.5 -3 -1860
60-79 674 69.5 -2 -1348
80-99 717 89.5 -1 -717
100-119 681 109.5 0 0
120-139 612 129.5 1 612
140-159 540 149.5 2 1080
160-179 517 169.5 3 1551
180-199 552 189.5 4 2208
Total 5439 422
Average enrollment = 109.5 + 20 * 422/5439
= 109.5 + 1.55
= 111.05
111 is Average Enrolment
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Step-by-step explanation:
veiw the attached image
hope it helps
