Question

There are 6 marbles in a box with numbers from 1 to 6 marked on each of them . The probability of drawing a marble from a box with a prime number marked on it will be​

Answer 1

Solution:

Total number of marbles = 6

Total number of marbles = 6So n(s) = 6

Number of marbles marked with 2 = 1

Number of marbles marked with 2 = 1n(e) = 1

$Probability = \frac{Number\ of\ favourable\ outcomes}{Total\ number\ of\ outcomes}$

• Total number of outcomes Number of favourable outcomes 

$=\ \frac{n\left(e\right)}{n\left(s\right)}\ =\ \frac{1}{6}= n(s)n(e) = 61$

ii) Total number of marbles = 6

ii) Total number of marbles = 6n(s) = 6

ii) Total number of marbles = 6n(s) = 6Number of marbles marked 5 = 1

ii) Total number of marbles = 6n(s) = 6Number of marbles marked 5 = 1n(e) = 1

$Probability = \frac{Number\ of\ favourable\ outcomes}{Total\ number\ of\ outcomes}$

• Total number of outcomes
• Number of favourable outcomes 

$=\ \frac{n\left(e\right)}{n\left(s\right)}\ =\ \frac{1}{6}= n(s)n(e) = 61</p><p>$

Answer 2

Step-by-step explanation:

Total number of possible outcomes = 6

No. of prime numbers = 2,3,5 = 3

Probability of drawing marble with a prime number =

$\frac{number \: of \: favourable \: outcomes}{number \: of \: total \: possible \: outcomes}$

$\frac{3}{6} = \: \frac{1}{2}$