Question
The probability that Vipin passes the exam is (2/7) and the
probability that Saloni fails the exam is (5/12). If both Vipin and Saloni give the exam then find the probability that both of them have the same result.Solution
Probability that Vipin fails the exam = 1 - (2/7) = (5/7)
Probability that Saloni passes the exam = 1 - (5/12) = (7/12)
Required probability = (2/7) × (7/12) + (5/7) × (5/12)
= (14/84) + (25/84) = (39/84) = (13/28)
When 10 litres of water is added to a mixture of milk and water, the ratio of quantity of milk and water becomes 4:5. Instead, if 20 litres of water had...
- Out of 180 litres of paint mixture, the ratio of red to blue paint is 5:4. What quantity of red paint should be added to make the ratio 7:5?
400 litres of mixture X contains acetone and glycerine in the ratio 11:14, respectively. 100 litres of the mixture is withdrawn and labelled as mixture ...
520 ml of mixture contains milk and water in the ratio of 8:5 respectively. If 120 ml of milk and 160 ml of water is added into it then ratio of milk to...
- A factory has a 720-litre solution of acid and water mixed in a 5:4 ratio. If 30% of this solution is removed and replaced with an equal amount of water, w...
In a blend of 183 liters consisting of juice and honey, the quantity of juice exceeds that of honey by 69 liters. When two-third of the mixture is subst...
A 30-litre mixture consists of milk and water in the ratio of 5:7. To this mixture, 2.5 litres of milk and 4.5 litres of water are added. How much more ...
In a 160 litres mixture of milk and water, the ratio of the milk to water is 4:1. If 28 litres mixture is taken out and replaced by same quantity of wat...
Quantity of water in a 420 litres mixture (Milk + Water) is 20 litres less than the quantity of milk in it. Find the quantity of water to be mixed so th...
A 600 ml mixture contains milk and water in the ratio of 3:7, respectively. If ‘x’ ml of milk as well as the same amount of water is added to the mi...
