A bag contains 6 Red, 5 Green, and 4 Yellow coloured balls. 2 balls are drawn at random after one another without replacement then what is the probability that at least one ball is Green?
2/3
4/5
3/8
4/7
2/7
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IBPS RRB PO Prelims 2017
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Chapters. Alligation and Mixture
Swami brought pulses of worth INR 32/kg and INR 45/kg. He mixed them with a third variety in the ratio 1 : 1 : 2. If the mixture is worth INR 88/kg, then the price of the third variety per kg will be:
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Chapters. Mensuration
The ratio of Curved Surface Area to Total Surface Area of Cylinder is 3:5. If the curved surface area of the cylinder is 1848 metre square, find the height of the cylinder?
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Chapters. Probability
One ball is picked up randomly from a bag containing 8 yellow, 7 blue and 6 black balls. What is the probability that it is neither yellow nor black?
Chapters. Boats and Stream
The speed of a boat in still water is (27/4) km/hr. The time required to travel a certain distance upstream is five times than that of downstream for the same distance. Find the speed of the stream?
Chapters. Problems on Ages
The present age of A is 3 years less than the present age of B. Ratio of B’s age 5 years ago and A’s age 4 years hence is 3 : 4 then find present age (in years) of A?
Chapters. Time and Work
A and B together can do a piece of work in 60 days, A and C can do the same work in 45 days. The ratio of Work efficiency of B and C is 1:2. In how many days they together can do the same work?
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