MCA Exam

There r some balls of five different colors in a box. 10 of each color. How many balls u have to take out to ensure that there r atleast 3 balls of the color.

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11 is the right ans.
11 years agoHelpfull: Yes(0) No(0)

13 5 thn 5 thn 3
11 years agoHelpfull: Yes(0) No(0)

MCA Other Question

there is a slowrun express tht runs btw bangalore & mum bai...it starts at 10.00pm & reaches destination @ 11.30 pm 3 days later...the train is operated on all days...if the train starts from bangalore , how many other slowrun expresses will it meet on the way..b4 reaching mumbai....??? white and black Birds r sitting in a telephone wire.At least one from white and one from black.Color must repeat after every 4 and 7 birds. What is the max no of arrangement.