MBA Exam

Out of 20 consecutive natural numbers, in how many ways can 4 numbers be selected, such that any two among the selected numbers differ by at least 3?

1) 20C3/3
2) 17C4
3) 23C4
4) 14C4

Read Solution (Total 1)

a + b + c + d + e = 20
a + 1 + b + 3 + c + 3 + d + 3 + e = 20
a + b + c + d + e = 10
14c4
5 years agoHelpfull: Yes(0) No(0)

MBA Other Question

A start walking from a place at a uniform speed of 2 km/hour
in a particular Direction. After half an hour, B starts from the same Place and
walks in the same direction as A at uniform speed and over takes A after 1 hour
48 min. calculate the speed of B ?Solved Sum from Arun Sharma.. I need If any one can come up with new Approach.

1) 20/9
2) 24/9
3) 21/9
4) 23/9
If the harmonic mean between two positive numbers is to their geometric mean as 12 : 13; then the numbers could be inthe ratio :please explain the solution whoever gets it correct..

1) 12 : 13
2) 1/12:1/13
3) 4:9
4) 2:3