Question

find the probability of number contains 7 out of 100 to 999​

Answer 1

Step-by-step explanation:

No(5)100-199------19

similarly for all ranges till 999 except for:

700-799----100

total no.containing 7's= 19*8+100=252

Therefore,

probability=(900-252)/900

= 648/900

= 0.72

Answer 2

Answer:

Step-by-step explanation:

171/1000