Question: ) x is a continuous random variable having p.d-f f(x)=4x/5 for o

) x is a continuous random variable having p.d-f

f(x)=4x/5 for o

=2/5(3-x) for 1

=0 , elsewhere

find the mean and standard deviation of x.

2) the result of a survey between males and females in a nation about their

chocolate consumption per year is given by the following table.

<10 kg 10kg to 20 20kg 30kg>30kg

male : 8 25 12 5

female: 15 24 19 10

(no. are in thousand i.e. multiple of *1000)

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