The diagram shows the plan, front elevation and side
elevation of a solid shape,
drawn on a centimetre grid.
Below is a sketch of the
solid shape.
Plan
Front elevation
Side elevation
cylinder
(1)
a) What is the name of the shape?
120 cm
(1)
b) What is the height of the shape?
Total marks: 2

hello,

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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step-by-step explanation: