An urn consists of 20 red balls and 30 green balls. We choose 10 balls at random from the urn. The sampling is done without replacement (repetition not allowed).

a. What is the probability that there will be exactly 4 red balls among the chosen balls?
b. Given that there are at least 3 red balls among the chosen balls, what is the probability that there are exactly 4 red balls?

Step-by-step explanation:

Given that an urn consists of 20 red balls and 30 green balls. We choose 10 balls at random from the urn. The sampling is done without replacement (repetition not allowed).

a) The probability that there will be exactly 4 red balls among the chosen balls

= no of ways of selecting 4 red balls and 6 green balls/total number of selecting 10 balls from 30 green balls

=

b) Let A = atleast 3 red balls

B = 4 red balls

Required prob= P(B/A) = P(AB) / P(A)

P(AB) = P(4 red balls)=0.2801

P(A) = P(atleast 3 red balls)

= 1-P(0 or 1 or 2 red ball)

=

Required prob =

answer: list the statements and i will follow up!

step-by-step explanation:

whole number data type

step-by-step explanation:

as whole number type represents whole number

like 1, 2 ,3, 4

in other words the whole numbers are those numbers which cannot be written infraction.

since we can take days as a whole number i.e 1 day 2 day and we cannot write 1.2 day hence we will use whole number data type