Question

A survey collected the record of 1000 families living in town about the quarterly expenditure on education of
each of their child. It is shown below:
Quarterly
Less than 4000 4000 - 9000
9000 - 14000
14000 and more
expenditure (in Rs.)
No. of students 20
210
325
445
A student is selected at random. Find the probability that: (a) quarterly expenditure on the student is less than
Rs. 400. (b) quarterly expenditure on the student is less than Rs. 9000. (c) quarterly expenditure on the student
is Rs. 14000 or more. (d) quarterly expenditure on the student is at least Rs. 4000.
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Answer 1

Answer:

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