Related Questions

A box contains 10 electric bulbs from which 2 bulbs are defective . Two bulbs are chosen at random. What is the probability that one of them is defective?
A 3/10
B 16/45
C 25/68
D 8/33
a box contains 20 electric bulbs , out of which 4 are defective . 2 bulbs are chosen at random from this box . The probability that at least one of these is defective is
A 7/19
B 6/19
C 5/19
D 3/19
A box contains 20 electric bulbs, out of which 4 are defective. Two bulbs are chosen at random form this box. The probability that at least one of these is defective is ___
A 7/19
B 6/19
C 5/19
D 3/19
From a batch of 3000light bulbs, 100 were selected at random and tested. If 5of bulbs on the sample found defective,How many defective bulb will be found in entire batch?
A 15
B 60
C 150
D 300
In distributing milk at a summer camp it is found that a quart of milk will fill either 3 large glass tumblers. How many small glass tumblers can be filled with one large glass tumbler ?
A 11/5
B 7/5
C 5/3
D 7/3
In distributing milk at a summer camp it is found that a quart of milk will fill either 3 large glass tumblers or 5 small lass tumblers. How many small glass tumblers can be filled with one large glass tumbler?
A 11/5
B 7/5
C 5/3
D 7/3
A glass when full of milk, weighs 1 kg. It weighs 0.75 kg when the glass is half full. What is weight of the empty glass?
A 0.25 kg
B 0.35 kg
C 0.40 kg
D 0.50 kg
The major constituent of laminate of safety glass, which holds the broken glass, pieces in their places during accident (and thus minimises the danger from flying glass fragments) is
A Polyvinyl alcohol
B Polyvinyl acetale
C Polyvinyl butyral
D PVC
Laboratory glass wares which reacts with hydroflouric acid, are made of the __________ glass.
A Lead
B Borosilicate
C Soda lime
D Alkali silicate
The material used in the filament of electric bulbs is
A Nichrome
B Tungsten
C Constantan
D German silver

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