MBA Exam

if 4 whole no's are taken at random & multiplied together, what is the probability that the last digit in the product is 1,3,7 or 9plz explain

1) 15/653
2) 12/542
3) 16/625
4) 13/625

Read Solution (Total 1)

The product of four number will be 1,3,7,9 only if all 4 numbers are having only
1 ,3,7,9 at units place.
so probability = (2/5)^4 = 16/625
11 years agoHelpfull: Yes(0) No(0)

MBA Other Question

There are three 3 digit numbers x, y, and z. The digits of the three numbers are non-zero digits formed of (1, 2, 3â€¦.9) using each of them exactly once. The ratio of x : y : z is 1 : 3 : 5. Find the sum of the digits of the number â€˜xâ€™?

1) 10
2) 12
3) 9
4) 13
Three men A,B and C round an oval garden from a fixed post at the rates of 5, 11/2,16/3 km per hour. they come back to the fixed post in 15/4 hours. Find the greatest length the race course can have.

1) 7/8 km
2) 4/8 km
3) 5/8 km
4) 1 km