From a group of 7 officers and 6 executives, 5 persons are to be selected to form a committee so that at least 2 officers are there in the committee. In how many ways can this be done ?
d) None of these
A silver wire, when bent in the term of a square, encloses an area of 625 cm2. How much area would the same wire include if it is bent to form a circle ?
d) 795.45 cm2