Advertisements
Advertisements
प्रश्न
A bag contains 3 red balls, 5 black balls and 4 white balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is:
not red?
उत्तर
\[\text{ Number of red balls } = 3\]
\[\text{ Number of black balls } = 5 \]
\[\text{ Number of white balls } = 4\]
\[\text{ Total number of balls }= 3 + 5 + 4 = 12\]
\[\text{ Therefore, the total number of cases is 12 } . \]
\[P\left( \text{ not a red ball } \right) = 1 - P\left( \text{ a red ball }\right) = 1 - \frac{1}{4} = \frac{3}{4}\]
APPEARS IN
संबंधित प्रश्न
Tell whether the given is certain to happen, impossible, can happen but not certain.
The next traffic light seen will be green.
In a simultaneous throw of a pair of dice, find the probability of getting:
a sum more than 7
Three coins are tossed together. Find the probability of getting:
at least two heads
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
spade or an ace
A bag contains 3 red balls, 5 black balls and 4 white balls. A ball is drawn at random from the bag. What is the probability that the ball drawn is:
black?
A bag contains 6 red, 8 black and 4 white balls. A ball is drawn at random. What is the probability that ball drawn is not black?
A bag contains 4 red, 5 black and 6 white balls. A ball is drawn from the bag at random. Find the probability that the ball drawn is:
not black
If you have a collection of 6 pairs of white socks and 3 pairs of black socks. What is the probability that a pair you pick without looking is
white?
Numbers 1 to 5 are written on separate slips, i.e one number on one slip and put in a box. Wahida pick a slip from the box without looking at it. What is the probability that the slip bears an odd number?
When a coin is tossed, there are 2 possible outcomes.
