Question

How many times does a typical person blink her eyes in a lifetime?

Short answer

A person blinks 672768000 times in a lifetime

Step-by-step solution

Number of average blink per day

A normal person blinks on an average of 16 times per minute.

The number of time a person blink in one year will be,

$$\begin{gathered} n=16\frac{times}{min}\times \frac{60min}{1hr}\times \frac{24hr}{1day}\times \frac{365day}{1year} \\ n=8409600times/year \end{gathered}$$

Number of blinks in a lifetime

Considering the life of an average person is 80 years, then the number of blinks in whole life will be,

$$\begin{gathered} n=80year\times 8409600times/year \\ n=672768000times \end{gathered}$$

Thus, a person blinks 672768000 times in a lifetime.