Question

how many whole numbers between 99 and 999 containing exactly one 0

Answer 1

101,102,103........110,120,130......190
19 numbers for every hundred
v hv 9 hundreds
so ans is 9*19=171

Answer 2

Answer:162

Step-by-step explanation:

we calculate 0 in every hundred.

in 100 to 200

101,102,103,104,105,106,107,108,109,110 total 10 zeros

and 120,130,140,150,160,170,180,190 total 8 zeros

total zeros=10+8=18

this will go with every hundred within 999

so from 201-300,301-400,401-500,501-600,601-700,701-800,801-900,901-999

there are eight more 100's

then total zeros= 18*9=162 zeros