total balls are z, the number of red balls is n and the remaining are blak balls,then the % of black balls equal to ?
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Consider the set P = {-5, -3, -1, 1, 3, 5 ...} consisting of 1998 numbers. If a be the average of the elements in P and b be twice the average of the first 1998 natural numbers, then which of the following is equal to (a - b)?
In a class total 34 students, 16 are have a brother, 15 are have sisters, 9 students don't have either brothers or sisters.Find the number of students having both brother and sisters.
There were 36 chairs. how many ways can they be placed such that all rows have equal no. of chairs and atleast three chairs are there in each row and there are atleast three rows.
2 12 30 56............. series?
In a party there are women and cats.There are 18 heads and 72 legs altogether. How many women and cats?
in a school for a student out of a 100 he got 74 of average for 7 subjects and he got 79 marks in 8th subject. What is the average of all the subjects?
Every station in N rail road issue every other station's ticket. some stations are added.Now they have to issue 46 more tickets. say the No.of stations after and before added.
Petrol prices increased by 40% expected hike in taxi & auto charges so, people may use public transport systems. What do you infer?
Dear sir,i'm siva.i have applied for rrb ASM.please send last 5 years Aptitude Question paper with answers.thanks.regards siva.
4 pipes inlet and 2 pipes outlets, find water inlet etc.
In a box there are four different coloured bells,of some quantity (4 each ) what is the minimum number of pick ups so that, atleast 2 of them of the same colour.
A car is filled with four and half gallons of fuel for a round trip.If the amount of fuel taken while going is 1/4 more than the amount taken for coming, what is the amount of fuel consumed while coming back?