Question

80 bulbs are selected at random from a
lot and their
life timeline
hrs) in
recorded below
(Life time in hrs) 300 500/700/900/1100
23 25
One bulb selected random, the joutobility that
life is
is 1150 his is
Probability
10
Frequency
its
(d)
I
80
16​

Answer 1

Step-by-step explanation:

Number of bulbs having life less than 900 hours = 10 + 12 + 23 = 45

P (a bulb has life less than 900 hours) = 45/80 = 9/16