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
Streets A, B, and C are straight and level, and they intersect to form a triangle. If streets A and B intersect at a 60 degree angle and if street C is perpendicular to street B, at what acute angle do street A and C intersect?
A 30 degree
B 45 degree
C 60 degree
D 90 degree
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
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
Which of the following gas is mostly used in town for street and domestic lighting and heating?
A Mond gas
B Coal gas
C Producer gas
D Coke oven gas
It is one street when the sun is shining another street in rain, and another under the full moon. How many streets are mentioned here
A two
B three
C one
D none
On a street with 25 house , 10 house have fewer than 6 rooms , 10 houses have more than 7 rooms and 5 houses have more than 8 rooms . What is the total number of hoses on the street that are either 6,7 or 8 room houses?
A 10
B 15
C 19
D 11
On a street with 30 house, 10 house have fewer than 4 rooms 14 houses have more than 5 rooms and 6 houses have more than 6 rooms what is the total number of hoses on the street that are either 4, 5 or 6 room houses?
A 13
B 14
C 20
D 11
The four bulbs of 40 W each are connected in series swift a battery across them, which of the following statement is true?
A The current through each bulb in same
B The voltage across each bulb is not same
C The power dissipation in each bulb is not same
D None of the above

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