MBA Exam

A+B<=129 and A<=B.Find the number of +ve integral solutions.

1) 4159
2) 4160
3) 8256
4) 4161

Read Solution (Total 1)

4160

when A=1, y = 1,2,3...128 ....128 values
when x=2, y=2,3,4,....127...... 126 values
..
..
when x=64
y=64,65 ................. 2 values

so total +ve integral solutions = 2+4+6+...128 = (1+128)*64/2=65*64= 4160
11 years agoHelpfull: Yes(1) No(0)

MBA Other Question

A person started on a trip of 20 miles. He started with a certain speed and after covering each mile, he decreased his speed by 25% If he took 8 min 6 sec to cover the 1st 4 miles. Find the time he would take to cover the next 4 miles.

1) 25 min 36 sec
2) 20 min
3) 21 min 30 sec
4) not
A and B can do a piece of work in 40 days. After working for 10 days, they are assisted by C and they take 20 days more to finish the work. If C does as much work in 2 days as B does in 3 days, then in how many days can each of them do the same work alone? p-50 days, 100 days and 70 daysa-60 days, 110 days and 75 daysb-70 days, 120 days and 90 daysc-60 days, 120 days and 80 daysd-60 days, 120 days and 90 days

1) p
2) a
3) b
4) c
5) d