Leoni is participating in four drawing competitions. If the probability of her losing any drawing competition is 0.7, find the probability of her winning
a) at least one competition.
b) exactly two competitions.

(a)

(b)

Explanation:

Represent losing with L and winning with W.

So:

--- Given

Probability of winning would be:

The question illustrates binomial probability and will be solved using the following binomial expansion;

So:

Solving (a): Winning at least 1

We look at the above and we list out the terms where the powers of W is at least 1; i.e., 1,2,3 and 4

So, we have:

Substitute value for W and L

Hence, the probability of her winning at least one is 0.7599

Solving (a): Wining exactly 2

We look at the above and we list out the terms where the powers of W is exactly 2

So, we have:

Substitute value for W and L

Hence, the probability of her winning exactly two is 0.2646

get the total number of pieces of fruit and divide it by 4 to get the average. the result is the answer to the problem. 14 total number of fruits and there are 4 members. 14 divided by 4 is equals to 3.5.

im srry but ur wrong the answer is d a smooth rock, some red dirt, and an empty bird's nest.