Groups of adults are randomly selected and arranged in groups of three. the random variable x is the number in the group who say that they would feel comfortable in a self-driving vehicle. determine whether a probability distribution is given. if a probability distribution is given, find its mean and standard deviation. if a probability distribution is not given, identify the requirements that are not satisfied. x p(x) 0 0.354 1 0.436 2 0.187 3 0.023

It is a discrete distribution of probability, with mean = 0.879 and SD = 0.787.

Step-by-step explanation:

With the given data, it can be said we have a discrete distribution of probability.

Calculation of the mean

Calculation of the standard deviation

50- 250 is correct i did that one too

step-by-step explanation:

answer: first option i.e. 'a' is correct.

step-by-step explanation:

since we have given that

number of minutes to wrap a small gift box = 4 minutes

we need to find the number of gifts to be wrapped in 5 minutes

since there is a direct variation, as the number of minutes will increase with   number of gifts to be wrapped.

so, let the number of gifts to be wrapped in 5 minutes be x.

so, it becomes,

hence, first option 'a'   is correct.