The average number of accidents at a level-crossing every year is 5. Calculate the probability that there are exactly 3 accidents there this year

Step-by-step explanation:

Given that the total number of accident recorded per year is 5

this can be taken as the sample size= 5

the sample size is then given as 3

we know that the probability of an even happening is

P(E)= number of event/number of possible outcome

therefore the probability of exactly 3 accident happening is given as

Pr(3 accident)= 3/5

=3/5

area = length x width

length = 2 x width

32 = 2 x width x width

32 = 2 x width^2

36 = width ^2  

width = 6

length = 12

area is 32

perimeter = 2 x 12 + 2 x 6 = 24 + 12 = 36

step-by-step explanation: