**Total 2-digit integers between 1 and 100 = 90 integer,**

**P = 1 - Q**

Where, P = probability that the selected number is not divisible by 7)

Q = probability that the selected number is divisible by 7)

**TOTAL NUMBER BETWEEN 10 AND 100 WHICH IS DIVISIBLE BY 7 = 13**

Q = (**TOTAL NUMBER BETWEEN 10 AND 100 WHICH IS DIVISIBLE BY 7) / Total 2-digit integers between 1 and 100**

Q = 13/90 then, P = 1 - Q = 1 - 13/90

**P = 77/90 Ans.**