Answer:
D 7
Step-by-step explanation:
Total no. of bulb= 5
no. of defected bulb= 3
no. of not defected bulb=2
Total no. of bulb combination = 5C2
=5!/2!(5-2)!
= 5!/2!3!
= 5×4×3×2×1/2×1×3×2×1
=120/12
=10
( since a room can be lighted with one bulb also)
total no. of bulb combination when room shall not light = 3C2
3!/2!(3-2)!
= 3!/2! 1!
= 3×2×1/2×1×1
= 6/2
=3
Now,
Total no. of trial when room shall light
=10-3
=7
Hence, number of trial when the room shall be lighted is 7 which is option d
The answer to the question is b
Step-by-step explanation:
So 2 pints = 1 quart
She need 3 quart
so 2 pints × 3 = 1 quart × 3
6 pints = 3 quart
...
The she need 6 pints which is
2 cups = 1 pint
She need 6, so mutiply with 6
2 cups × 6 = 1 pint × 6
12 cups = 6 pints
Then this is the answer, you got
12 cups = 6 pints = 3 quart
She need 12 cups of water to make fruit punch
