A pile of identical one rupee coins are placed over a metre scale as shown in the figure. The thickness of a one rupee coin is_____

A stock of identical coins are placed on a scale as shown in the figure. The thickness of a coin is "_______"

If m rupee coins and n ten paise coins are placed in a line,then the probability that the extreme coins are ten paise coins,is

One compartment of a purse contains three 25 paise coins and 2 one rupee coins and the other compartment contains two 25 ps. Coins and 3 one rupee coins. The probability of drawing a rupee from the purse is

Find the probability of drawing one rupee coin from a purse with two compartments one of which contains 3 fifty paise coins and 2 one rupee coins and the other contains 2 fifty paise coins and 3 one rupee coins.