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Estimate the number of hairs on your scalp

Updated: Nov 18, 2022

Mobiprep has created step by step solution to estimation questions for all product management and consulting interview questions to help you with the mastering placement interviews. So letâ€™s get started with the estimation questions.

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In this estimation question we have analysed the market size of the number of hairs on your scalp. Check out the step-by-step answer created by Mobiprep experts.

Approach:

Estimation Question Step-2: Solution

Now, assuming that 80% of the scalp is covered by hair.

We have,

80% of 150 sq. cm = 120 sq. cm

Assuming, the thickness of the hair to be 1 mm or 0.1 cm

So, for total no. of hairs on scalp

= 120/0.1 = 1200 hairs

Now, assuming that 80% of the scalp is covered by hair.

We have,

80% of 157 sq. cm = 125.6 sq. cm

Assuming, the thickness of the hair to be 1 mm or 0.1 cm

So, for total no. of hairs on scalp

= 126/0.1 = 1260 hairs