Question

he percentage of marks obtained by a student in the monthly unit tests are given below
Enit test
1
II
IV
crcentage of marks obtained 58
74
70
ind the probability that the student gets (1) a first class i e. at least 60 % marks
1) marks between 70% to 80% (ii) a distinction i.e. 75% or above (iv) less than 65%
able shows the marks scored by a group of 90 students in a mathematics test of 100 mark
arks
0-20 20-30 30-40 40-50 50-60 60-70 70-100
umber of students 7 10 10 20 20
8
ind the probability that a student obtained: () less than 20% marks (1) 60 or more
ollowing frequency distribution gives the weight of 38 students of a class:
Jeight in kg 31-35 36-40 41-45 46-50 51-55 56-60 61-65 66-70
umber of students 9 5 14 3 1 2. 2 1
Find the probability that the weight of a student in the class is
at most 60 Kg (ii) at least 36 Kg (l) not more than 50 Kg
llowing table chaue the birth​

Answer 1

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