A number is selected from the counting numbers from 1 to 10. What is the probability of it being an even number?

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1 മുതൽ 10 വരെയുള്ള എണ്ണൽ സംഖ്യകളിൽ ഒരു സംഖ്യ തിരഞ്ഞെടുക്കുന്നു. ഇത് ഇരട്ട സംഖ്യ ആകാനുള്ള സംഭവ്യത ?

A0.25

B0.5

C0.75

Answer:

S = {1,2,3,4,5,6,7,8,9,10} ഇരട്ട സംഖ്യ = {2, 4, 6, 8 ,10} P(A)= n(A) / n(S) n(A) = 5 ;; n(S) = 10 P(A) = 5 /10 =1/2 = 0.5

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Which of the following not false

the square root of the mean of squares of deviations of observations from their mean is standard deviation
The variability of a data will decrease if sd increases
The stability or the consistency of a data increases as sd decreases
The data with less sd is better than a data with high sd provided that the two data were expressed with the same unit.