Question

Please help me!!!!!!!!!!!!!

Answer 1

59%

Explanation:

First let us work out the total number of cars waiting in the given period.

= 0 *2 + 1*9 + 2*16 + 3*12 + 4*8 + 5*6 + 6*4+7*2+8*1

= 185

Now the number when there are less than 5 cars in line ( that is when there are 0 - 4 cars in line) =

0*2 + 1*9 + 2*16 +3*12+4*8

= 109

Thus the required probability = 109/185

= 0.589

= 59% (answer)

Answer 2

The total number of observations is

2+9+16+12+8+6+4+2+1=60

The first five counts refer to 0 to four cars:

2+9+16+12+8=47

The probability is the fraction less than five,

p= 47/60 = 0.783333...

Answer: 78%