Andhra Pradesh Board Solutions for Exercise 2: Exercise 10(b)

One in $9$ ships is likely to be wrecked, when they are set on sail, when $6$ ships are on sail find the probability for atleast one will arrive safely.

One in $9$ ships is likely to be wrecked, when they are set on sail, when $6$ ships are on sail find the probability for exactly three will arrive safely.

It is given that $10\%$ of the electric bulbs manufactured by a company are defective. In a sample of $20$ bulbs, find the probability that more than $2$ are defective.

On an average, rain falls on $12$ days in every $30$ days, find the probability that, rain will fall on just $3$ days of a given week.

For a binomial distribution with mean $6$ and variance $2$, find the first two terms of the distribution.

Five coins are tossed $320$ times. Find the frequencies of the distribution of number of heads and tabulate the result.

Find the probability of guessing at least $6$ out of $10$ of answers in True or false type examination.

Find the probability of guessing at least $6$ out of $10$ of answers in multiple choice with $4$ possible answers.