Q.No.3. (a) In a saving group, there are 400 members and the number of saving certificates held by them are shown in the following table: No. of Certificates held No. of Members 1-50 10 51-100 15...

Extracted text: Q.No.3. (a) In a saving group, there are 400 members and the number of saving certificates held by them are shown in the following table: No. of Certificates held No. of Members 1-50 10 51-100 15 101-150 30 151-200 40 201-300 120 301-400 100 401-500 85 Construct a suitable graph of the distribution of savings certificates. (b)A man gets a rise of 10% in salary at the end of his first year of service, and the further rises of 20% and 25% at the end of the second and third years respectively. The rise in each case is being calculated on his salary at the beginning of the year. To what annual percentage increase is this equivalent?