Question
A wire of a given material has length ‘I’ and
resistance ‘R’. Another wire of the same material having three times the length and twice the area of cross-section will have a resistance equal to:Solution
The correct answer is D
A bag contains 19 white and some black balls. If the probability of drawing a black ball from the bag is twice that of drawing a white ball, find the nu...
A basket contains 3 yellow, 5 purple and 3 red flowers. If 3 flowers are drawn at random, what is the probability that at least two are of same colour?
A bag contains 24 white and some black balls. If the probability of drawing a black ball from the bag is 1.5 times that of drawing a white ball, ...
A box contains 6 red balls, 4 blue balls, and 5 green balls. If two balls are drawn at random, what is the probability that one is red and the other is ...
From a bag containing 12 white and 15 yellow ribbons, find the probability of picking 2 ribbons of each type at random.
A bag contains 10 red books, 7 yellow books and 7 green books . 3 books are drawn randomly. What is the probability that the...
A bag contains 8 yellow balls, 7 orange balls, and 3 blue balls. Two balls are drawn at random. Find the probability that the two balls are yellow.
A bag contains 20 black and 22 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...Rohan divided a two-digit number by '7', what is the probability that the remainder obtained is a prime number?
P and Q together started a business with initial investment in the ratio of 1:4, respectively. The time-period of investment for P and Q is in the ratio...
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