A bag contains 20 balls. 8 balls are green, 7 are white and 5 are red. What is minimum number of balls that must be picked up from the bag blind-folded (without replacing any of it) to be assured of picking at least one ball of each colour?
4
7
11
16
Since, 8 green balls + 7 white balls = 15 balls
7 white balls + 5 red balls = 12 balls
And 8 green balls + 5 red balls = 13 balls
Now, if we pick 15 balls, they may be white, green or red but if we pick 16 balls, then its certain that there will be atleast one ball of each colour.
Nine litres are drawn from a cask full of water and it is then filled with milk, Nine litres of mixture are drawn and the cask is again filled with milk, The quantity of water now left in the cask to that of the milk in it is 16 : 9. How much does the cask hold?
Science & Technology · Easy
Sustainable development requires which of the following? 1. Preservation of ecological resources and greater use of renewable resources. 2. Encouragement to the use of environmentally-safe technologies for development purposes. 3. Formulation and implementation of policy framework for people-security and human justice, including ecological and economic security. Select the correct answer using the code given below:
Science & Technology · Easy
Consider the following statements about the Cabinet Mission: 1. Stafford Cripps was the Chairman of the Mission. 2. It supported the cause of Pakistan’s independence. 3. It recommended that provinces will have residuary powers. Which of the statements given above is/are not correct?
Science & Technology · Easy
The identity platform 'Aadhaar' provides open "Application Programming Interfaces (APIs)". What does it imply ? 1. It can be integrated into any electronic device. 2. Online authentication using iris is possible. Which of the statements given above is/ are correct ?
Science & Technology · Easy