On the average, a certain light bulb is supposed to last 450 hours. If it

can expect to finish reading during the life of the bulb?

72 novels

Step-by-step explanation:

A number of assumptions are involved regarding operating environment, utilization fraction, and probability of failure as a function of time. The precise meanings of the words "average", "supposed to last", "maximum", and "expect" are involved. The details are too arcane to go into here.

(450 hours) / (6 1/4 hours/novel)

= (450 / (25/4)) novels

= (450*4/25) novels

= 72 novels