Thread: Simple GCSE Binomial Distribution Question

Hello posters, i am just wondering if you could help me out here; I have my GCSE exam in two days and having left school without a mark scheme - please could you just tell me the answer to question below so I can see whether i got it right. Thanks in advance.

The probability that a bag of rice weighs less than 260g is 0.3.

Four Bags are chosen at random

What is the probability that exactly one bad weighs less than 260g?
You may use p⁴ + 4pq³ + 6p²q² + 4pq³ + q⁴

Originally Posted by dan9408

Hello posters, i am just wondering if you could help me out here; I have my GCSE exam in two days and having left school without a mark scheme - please could you just tell me the answer to question below so I can see whether i got it right. Thanks in advance.

The probability that a bag of rice weighs less than 260g is 0.3.

Four Bags are chosen at random

What is the probability that exactly one bad weighs less than 260g?
You may use p⁴ + 4pq³ + 6p²q² + 4pq³ + q⁴

X ~ Binomial(n = 4, p = 0.3)

Originally Posted by dan9408

Hello posters, i am just wondering if you could help me out here; I have my GCSE exam in two days and having left school without a mark scheme - please could you just tell me the answer to question below so I can see whether i got it right. Thanks in advance.

The probability that a bag of rice weighs less than 260g is 0.3.

Four Bags are chosen at random

What is the probability that exactly one bad weighs less than 260g?
You may use p⁴ + 4pq³ + 6p²q² + 4pq³ + q⁴

Dear dan9408,

For the Binomial distribution,
where



In this case define the success as "a bag of rice weights less than 260g"

Hope you will be able to continue.