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ATQ, Let the number of 10 rupees coins in the piggy bank be 'p'. So, the number of 5 rupeees coins in the piggy bank = 0.7p And the number of 20 rupees coins in the piggy bank = 0.70/1.75 = 0.4p So, the total number of coins in the piggy bank = p + 0.7p + 0.4p = 2.1p So, the probability that a 5 rupees coins and a 10 rupees coins are drawn = pC1 × 0.7pC1/ 2.1pC2 = 1/3 (2p × 0.7p) / {2.1p (2.1p - 1) } = 1/3 2.1p - 1 = 2p 0.1p = 1, p = 10 So, the total number of coins in the piggy bank = 2.1 × 10 = 21
The major maize producing districts in Rajasthan are -
Which earthquake measuring scale is based on Earth's rigidity and the amount and area of slip on the fault?
Which of the following is not correctly matched?
Norman Borlaug was given Nobel Prize in which field?
Which of the following pairs of State and formation year is/are correct?
I. Nagaland - 1972
II. Uttarakhand - 2000
III. Arunachal Pradesh - 1987
A. his subjects wisely
B. was a very kind and generous
C. king who looked after
D. everyone said that he
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Which blood cells are called 'Soldiers' of the body?
What is the range of the intensity scale used in measuring earthquakes?