Answer:
bro si would be 20000 and time would be 1 year because rate is in per annum or per year.
It Would Be 96% Because If That Was The Highest Percentage That You Could Reach On The Test Than That Would Be Your Final Grade Unless Your'e Trying To See If That Grade Would Affect Your Average.
We are given a key pad assuming that the numbers are of 10 options from 0 to 9. IN thsi case, guessing the 3 digit pin number can be determined via counting method. The first number has 10 options so as second and third. Hence the total number of options is 10^3 or 1000. The probability of getting the pin teh first time is 1/1000 or 0.001.