YASH
CLASSES
2. A
bag contains 5 red balls and some blue balls . If the probability of drawing
3. A box contains 12 balls and some x black
balls . If one ball is drawn
at
4. If a die is thrown twice . what is the probability
that (1) 5 will not come
5. A lot of 144 bulb 9 bulb are defective ones . one bulb is
drawn at random
PROBABILITY
1. A jar contains 24 marbles ,some are green other are blue . If a marble is drawn
at random
from the jar the probability that it is green is 2/3. find the number
of blue balls in the jar .
a blue ball is blue double that of a red ball determine the number of blue balls
random
from the box what
is the probability that it will be a black ball?
either time (2) 5 will come up least once
from
the lot. what is the probability that this bulb is
defective ?
6. A box contains 90
discs which are numbered
from 1 to 90. If one disc is
drawn
at random from the box , find the probability that it bears
(1) a two
digit number (2) a perfect square number.