only the question of probability pls
Answers
Answer:
getting 2 = 1/6
getting prime number that is (2,3,5)= 3/6=1/2
number less than 3 that is (1,2) =2/6=1/3
x+1/x=4
squaring both sides
x(square) + 1/ (xsquare) + 2 = 16
hence 16-2 answer is 14
Topic
Probability
Given
A die is thrown at random.
To Find
Probability of getting
a) 2
b) a prime number
c) a number less than 3
Formula
Probability = O.C. / T.P.O.
where
O.C. is number of Outcomes under given Circumstances and
T.P.O. is number of Total Possible Outcomes.
Prerequisite Knowledge
When a die is thrown randomly there are Six possible outcomes that are 1, 2, 3, 4, 5 and 6.
2, 3 and 5 are prime numbers.
1 and 2 are less than 3.
Solving
a) When a die is thrown, number of outcome as 2 from 6 possible outcomes is 1.
Number of outcomes under given
circumstance = 1 ( that is number 2 )
Total Possible outcomes = 6
Probability = 1 / 6
b) When a die is thrown, number of outcomes as prime number from 6 possible outcomes will be 3. ( As 2,3 and 5 are prime numbers. )
Number of outcomes under given
circumstance = 3 ( Number 2,3 and 5 )
Total Possible outcomes = 6
Probability = 3 / 6 = 1 / 2.
c) When a die is thrown, number of outcomes as numbers less than 3 from 6 possible outcomes will be 2. ( Only 1 and 2 are less than 3. )
Number of outcomes under given
circumstance = 2 ( Number 1 and 2 )
Total Possible outcomes = 6
Probability = 2 / 6 = 1 / 3.
Answer
So, when a die is thrown randomly the Probability of getting
a) 2 is 1/6.
b) a prime number is 1/2.
c) number less than 3 is 1/3.