RS Aggarwal Quantitative Aptitude PDF Free download: AVERAGE
6.AVERAGE Ex.1:Find the average of all prime numbers between 30 and 50? Sol: there are five prime numbers between 30 and 50. They are 31,37,41,43 and 47. Therefore the required average=(31+37+41+43+47)/5 ó199/5 ó 39.8. Ex.2. find the average of first 40 natural numbers? Sol: sum of first n natural numbers=n(n+1)/2; So,sum of […]