Question

pranalee was practising for a 100m running race she ran 100m distance 20 times the time required in seconds for attempt was as follow 18,17,17,16,15,16,15,14,16,15.15,17,15,16,15,17,16,15,14,15 find mean time taken for running

Answer 1

mean = x +1/2 (X= no. of digits)

= 35+1/2.

=36/2

=18 seconds