Question

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The percentage of marks obtained by a student in monthly tests are given below :

TEST 1 2 3 4 5 6

PERCENTAGE

OF MARKS

52 60 65 75 80 72

Find the probability that in the next test the student gets :

(a) More than 70% marks

(b) Less than 70% marks

(c) Between 60% to 80% (included 60 and 80 )​

Answer 1

Answer:

a) 1/2

b) 1/2

c) 5/6

Step-by-step explanation:

a) Number of total tests conducted till now : 6

Number of tests in which marks are above 70% : 3

Probability : Number of favourable outcomes/ Number of total outcomes

= 3/6 => 1/2

b) Number of total tests : 6

Number of tests in which marks are less than 70% : 3

Probability :

= 3/6 => 1/2

c) Number of total tests : 6

Number of tests in which marks are between 60-80% : 5

Probability :

= 5/6

Hope it helps

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