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CBSE Class 9 Answered

The percentage of marks obtained by a student in monthly unit test are given below: Unit Test 1 II III IV V % Marks 70 72 65 68 85 Find the probability that the student gets (a) more than 70% marks (b) more than 90% marks
Asked by Topperlearning User | 11 Dec, 2013, 03:32: AM
answered-by-expert Expert Answer

Total number of tests = 5

(a) Marks greater than 70% = 72 and 85, hence in 2 tests.

P(student gets more than 70% marks) =

(b) Marks more than 90 = 0, hence in 0 tests.

P(student gets more than 90% marks) =

Answered by | 11 Dec, 2013, 05:32: AM

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