State true or false. An iron ball and a wodden ball of the same radius are released from a height in vaccum, the iron ball will reach the ground first.

A piece of paper and iron piece are dropped simultaneously from the same point in vaccum.Which one will reach at ground earlier?

There are 3 red balls and 7 green balls in a bag, 8 red and 7 green balls in another. i) Whạt is the probability of getting a red ball from the first bag? ii) From the second bag? iii) If all the balls are put in a single bag, what is the probability of getting a red ball from it?