The percentage of marks obtained by a student in monthly unit tests ar

1.	The percentage of marks obtained by a student in monthly unit tests are given below :Unit test:IIIIIIIVV% of marks obtained:6971736876Find the probability that the student gets :(i) More than 70% marks(ii) Less than 70% marks(iii) A distinction.
Answer» Let, (i) E be the event of getting more than 70% marks The number of times E happens = 3 P(A) = \(\frac{3}{5}=0.6\) (ii) F be the event of getting less than 70% marks The number of times F happens = 2 P(B) = \(\frac{2}{5}=0.4\) (iii) G be the event of getting a distinction The number of times G happens = 1 P(C) = \(\frac{1}{5}=0.2\)

The percentage of marks obtained by a student in monthly unit tests are given below :Unit test:IIIIIIIVV% of marks obtained:6971736876Find the probability that the student gets :(i) More than 70% marks(ii) Less than 70% marks(iii) A distinction.

Answer»

Let,

(i) E be the event of getting more than 70% marks

The number of times E happens = 3

P(A) = \(\frac{3}{5}=0.6\)

(ii) F be the event of getting less than 70% marks

The number of times F happens = 2

P(B) = \(\frac{2}{5}=0.4\)

(iii) G be the event of getting a distinction

The number of times G happens = 1

P(C) = \(\frac{1}{5}=0.2\)

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The percentage of marks obtained by a student in monthly unit tests are given below :Unit test:IIIIIIIVV% of marks obtained:6971736876Find the probability that the student gets :(i) More than 70% marks(ii) Less than 70% marks(iii) A distinction.

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