Question

78. On one page of a telephone directory, there were 200 telephone numbers. The frequency
distribution of their unit place digit (for example in number 25871367, the unit place digit is 7) is given
in the table below :
Digit 0 1 2 3 4 5 6
Frequency 22 26 22 22 20 10 14 2816 is :
(1) a non-zero multiple of 3.
in an odd number.​

Answer 1

Step-by-step explanation:

i) Acoording to the question,

Let A be the event that getting a number whose unit's digit  is 6.

n(A) = 14 and n(S) = 200

P(A) = 14/200 = 7/100

 

ii) A non zero multiple of 3.

Let B be the event that getting a non zero multiple of 3 at unit's place

n(B) = 22 + 14 + 20 = 56

P(B) = 56/200 = 7/25

 

iii) Let C be the event that getting non zero even number

n(C) = 22 + 22 + 20 + 14 + 16 = 94

P(C) = 94/200 = 47/100

 

iv) Let D be the vent that getting odd number at unit's place.

n(D) = 26 + 22 + 10 + 28 + 20 = 106

n(D) = 106/200 = 53/100

Answer 2

Step-by-step explanation:

0.7,0.28,0.47,0.53 these all are answer