Question

a number is chosen at random from the numbers -3,-2,-1,0,1,2,3 what will be the probability that square of this number is greater than or equal to 4

Answer 1

there are total 7 terms
-3,-2,-1,0,1,2,3
Square of number greater or equal to 4 is of numbers:: (-3&3)^2 = 9
(-2&+2)^2= 4

rest of numbers will have value less than four.


Now the probability of square greater than 4

P= total numbers whose square>= 4/ total numbers
P= 4/7
answer is 4/7 ,,,,......

Answer 2

probability that square of this number is greater than or equal to 4 is 4/7 becoz 2&-2 square=4,3&-3 square=9