a ® o A total of 20 cors were tested at a checkpoint. A . • 6 cars failed the brakes test (8). , W 7 cars, faited the lights test (W • 9 cars passed both the tests for brokes and lights of Complete Venn piogrom . diagram b) Find a (Bir) a B R 6 7 7 구

c. (0.6,-1.4)

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that is the sum

step-by-step explanation:

there are no other answers without knowing the variables values

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b) 62.47% of the students are between 14 and 18 years old.

step-by-step explanation:

mean = 15 and standard deviation = 2

student between 14 to 18

formula used z-score

for age 14 , z score

using z-table , p(z> -0.5)=0.3085

for age 18 , z score

using z-table , p(z< 1.5)=0.9332

p(-0.5< z< 1.5)=0.9332-0.3085 = 0.6247

thus, 62.47% of the students are between 14 and 18 years old.

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answer: none of these answers are correct only the second half is

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