Question

How many positive three-digit integers have the hundredths digit 8 and unit’s digit 5? Find the probability of selecting one such number out of all three-digit numbers.

Answer 1

Total number of three-digit numbers = 900

Numbers with the hundredth digit 8 and the unit’s digit 5 are 805, 815, 825, ..., 895.

Number of favourable outcomes = 10

P(selecting one such number) = `10/900  "or"  1/90`