In a board exam, 53% passed in Biology, 61%passed in English, 60% passed in Social Studies, 24% in biology and English, 35% in English and Social studies, 27% in Biology and Social studies and 5% in none. percentage of passes in all the three subjects is...
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
A ladder of 25 ft length reaches a window which is 24 ft above the ground level on one side of the street. Keeping its foot at the same point the ladder is turned the other side of the street and now reaches a window of 7 ft high. then the width of the street?
a] 30 b] 32 c] 29 d] 31
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