Advertisements
Advertisements
प्रश्न
What is the probability that a student chosen at random out of 3 girls and 4 boys is a boy?
Advertisements
उत्तर
Given, total children = 7 = 4 boys and 3 girls.
So, favourable outcomes for a day = 4
Total number of possible outcomes = 7
∴ Probability = `"Favourable outcomes"/"Total number of possible outcomes" = 4/7`
APPEARS IN
संबंधित प्रश्न
In a simultaneous throw of a pair of dice, find the probability of getting:
a number other than 5 on any dice.
A card is drawn at random from a pack of 52 cards. Find the probability that the card drawn is:
a jack, queen or a king
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:
white?
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
black?
A glass jar contains 6 red, 5 green, 4 blue and 5 yellow marbles of same size. Hari takes out a marble from the jar at random. What is the probability that the chosen marble is of red colour?
When a coin is tossed, there are 2 possible outcomes.
The probability of the spinning arrow stopping in the shaded region (Figure) is `1/2`.
Following cards are put facing down:
| A | E | I | O | U |
What is the chance of drawing out A or I?
Following cards are put facing down:
| A | E | I | O | U |
What is the chance of drawing out a consonant?
Classify the following events:
Christmas will be on 25 December.
