Question

A dice is thrown once. Find the probability of getting a prime number.

Answer 1

ɢɪᴠᴇɴ:

• A dice is thrown once.

ᴛᴏ ғɪɴᴅ:

• The probability of getting a prime number.

ᴀɴsᴡᴇʀ:

A dice has 6 faces numbered from 1 to 6 on its faces . So when we look for prime numbers in the set { 1,2,3,4,5,6} we will see that 2 , 3, and 5 are only the prime numbers as they have only 1 and itself as their factors.

Total number of possible outcomes = 6.

Total number of favourable outcomes = 3.

So , Probability of getting a prime number = 3/6 = 1/2.

Hence the required answer is 1/2.

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${\underline{\underline{\red{\bf{\dag History\: of\: probability:}}}}}$

• Forms of probability was developed by Arab mathematicians.

• It was done between 8th and 13th century.
• Al-Khalil wrote the Book of Cryptographic Messages which contains the first use of permutations and combinations to list all possible Arabic words with and without vowels.

Answer 2

Answer:

$\frac{1}{2}$

Step-by-step explanation:

It is the correct answer.