Question
Odds in favour of A passing the exam is 1 : 3 and Odds
against B passing the exam is 4 : 1. What is the probability that exactly one of them will pass the exam?Solution
Probability that A will pass the exam = 1/4
Probability that B will not clear the exam = 4/5
Case- 1
Probability that A will pass the exam and B will not clear the exam = 1/4 X 4/5=1/5
Case- 2
Probability that A will not clear the exam and B will clear the exam = 3/4 X 1/5=3/20
Therefore, required probability = 1/5 + 3/20 = 7/20
11kg of tea costing Rs. 440 per kg is mixed with 14 kg of tea costing Rs. 360 per kg. The average price per kg of the mixed tea is
A vessel contains some milk .7 liter of the milk was taken out of the vessel and replaced with 7 liter of water and again 7 liter of mixture was taken o...
If p = 50 - q - r and pq + r(q + p) = 816 then find the value of (p2Â + q2Â + r2) .
A vessel is full of a mixture of kerosene and petrol in which there is 18% kerosene, 8 litre are drawn off and then the vessel is filled with petrol. Re...
Ratio of present ages of mother and her son is 21:10 respectively. Father’s present age is 17 years more than that of mother. If the present average a...
9 litre of milk is taken out from a container and replaced by water. This process is repeated once more, the ratio of quantity in container (M: W) is 16...
C purchased 20 kg of oranges at the rate of ₹150 per kg from a wholesaler who uses a weight of 850 grams for the kg weight. C sold all these oranges a...
A shopkeeper has 76 kg rice a part of it, he sells at the profit of 48% and rest at loss of 28% and he get the loss of 16% so what is the quantity sold ...
A and B together can complete a work in 12 days. B and C together can complete the same work in 15 days, and A and C together can complete it in 20 days...
Simplify the following expression: