Question

QUESTION NO :- 30

plz solve .

Answer 1

Teachers of age 18-29 (T1) = 11
Teachers of age 30-39 (T2) = 32
Teachers of age 40-49 (T3) = 30
Teachers of age 50-59 (T4) = 7

Total teachers (T) = T1+T2+T3+T4 = 11+32+30+7 = 80

(a)
Teachers above 18 years = T1+T2+T3+T4 = 11+32+30+7 = 80
Total teachers =  80
Probability 80/80 = 1

(b)
Teachers between 30-39 = T2 = 32
Total teachers = 80
Probability = 32/80 = 2/5

(c)
Teachers above 60 years = 0
Total teachers = 80
Probability = 0/80 = 0

(d)
Teachers of 40 years or more = T3+T4 = 30+7 = 37
Total teachers = 80
Probability = 37/80

Hope this helps you.

Answer 2

Hi User !!

Here's ur ans :-

Total outcomes = 80

a ) 18 years or more ?

solution :-

Possible outcomes are :-
( 18 - 29 ) ( 30 - 39 ) ( 40 - 49 ) ( 50 - 59 ) :-
11 + 32 + 30 + 7 = 80

E = 18 years or more

P ( E ) = Possible outcome/Total outcome

P ( E ) = 80/80

P ( E ) = 1

* It is sure and certain event.

b ) Between 30 - 39 ?

solution :-

Possible outcome :- 32


E = Between 30 - 39

P ( E ) = 32 / 80

P ( E ) = 2/5


c ) Above 60 years ?

Solution :-

Possible outcome :- 0

E = Above 60 years

P ( E ) = 0 / 80

P ( E ) = 0

d ) 40 or more than 40 years ?

solution :-

Possible outcome :- ( 40 - 49 ) ( 50 - 59 )=
30 + 7 = 37

E = 40 or more than 40 years

P ( E ) = 37/80