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- نقطتان )2( Q8) Find the variance of the following probability * ?distribution 1 2 4 f(x) 0.22 0.12 0.52 0.14 0.6891 O 0.8256 O 0.251 O 0.9636 O 0.9531 Oplovabllity distribution. i Find the expected value and the standard deviation for the distribution in (i) above. 9. A team of 3 players is to be chosen from 4 boys and 5 girls. Find the: (i) probability distribution for the number of girls in the team. (ii) expected value and the standard deviation for the distribution in (i) above. 6.Binomial Probability Distribution. Gasoline combust and the heat it produces is used as energy source for a car to run. Supposed that only 80.32% of the gasoline combusts among the cars, (a) determine the probability of 3 out of 8 cars selected at random will combust more than 80.32%. (b) calculate the mean. (c) calculate the standard deviation.