9. The given cable gives the enrolment in Higher Secondary School in 1978 Find the
average enrolment in Higher Secondary School
Enrolment Number of schools
20:39
$26
4059
620
60-79
672
89.99
217
100-119
681
120-139
612
140-159
50
160-179
517
180-199
$52
TotalL
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