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statistical distributions question

I don't understand how to do part b or part c

for part b i don't know how to calculate it when it's a decimal
for part c how do you do cumulative distribution tables i've tried looking at some videos but it's not making sense to me bc theres no B~(n,p) so i'm confused

https://imgur.com/GexFNMs

Reply 1

Pangol

Original post by PureHeroine

These questions are not about binomial distributions. The binomial distribution is one example of a discrete probability distribution, but these are other examples.

For part (b), you have to find P(X > 1.2). X can only take the values 0, 1, 2 and 3. Which of these are > 1.2 ?

For part (c), you simply have to add up the probabilities as you go along. For example, P(X <= 1) will be P(X = 0) + P(X = 1).

Reply 2

username3934898

Original post by Pangol

For part (b), you have to find P(X > 1.2). X can only take the values 0, 1, 2 and 3. Which of these are > 1.2 ?

For part (c), you simply have to add up the probabilities as you go along. For example, P(X <= 1) will be P(X = 0) + P(X = 1).