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According to question, a × 0.18 × 3 + (a + 750) × 0.24 × 3 = 2052 Or, 0.18a + 0.24a + 180 = 684 Or, 0.42a = 504 Or, a = 1200
A box contains 6 red, 5 green, and 4 blue balls. Two balls are drawn randomly. What is the probability that they are of different colors?
A is trying to break a bulb by throwing balls at it. If he hits the bulb 3 times in every 5 throws and bulb breaks 3 times out of 12 hits, then find the...
In a box there are 3 red, 6 blue, and 9 yellow cards. One card is picked up randomly. What is the probability that it is neither red nor yellow?
A poly-bag contains (3a - 4) red, (2a - 3) white, and (a - 1) black rubber bands. Two rubber bands are drawn randomly from the bag, and the probability ...
Two hats are picked at random, what is the probability that one is blue and one is yellow?
Ten tickets numbered 1 to 15 are placed in a box, mixed up thoroughly and then one ticket is drawn randomly. If it is known that the number on the drawn...
A box contains 7 blue and 7 green balls. The probability of drawing three balls of the same colour is
There are 30 cars standing in a parking lot which consist of silver, grey and white cars. The number of grey and white cars are equal, and the number of...
A bag contains 12 black and 14 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
One summer peter visits 4 villages (A, B, C and D) in a random order. Find the probability that he visits (i) A before B (ii) A before B and B before C ...