After measuring 120 metres of rope, it was discovered that the metre rod was 3cm longer. The true length of the rope measured is
Option
a) 116m 40 cm
b) 121m 20 cm
c) 123m
d) 123 m 60 cm
the following tables gives the life time of 500 CFL lamps
Life time : 9,10,11,12,,13,14,more than 14
No of lamp: 26, 71,82,102,89,77,53
total : 500
a bulb is selected at random . the probabilty that the life time fo the selected bulb is atmost 11 months is given by
Three men or eight boys can do a piece of work in 17 days.How manay days will two men and six boys together take to finish the same work:
A)11 days
B)17 days
C)12 days
D)none