Question

8.
The table given below shows the data of students who have gone an educational tour.
If one of the students is selected at random from the above group, find the probability that the
student chosen is:
Class 7
Class 8
Class 9
Boys
15
20
10
Girls
10
25
20
(a) a boy
(d) a student of class 8 or 9
(b) a girl
(e) a boy of class 8
(c) a student of class 7
(1) a girl not studying in class 8​

Answer 1

Step-by-step explanation:

ఠుస్ ఠుస్ ఠిస్ ఠుస్ ఠుస్ ఆన్సర్

Answer 2

Answer:

The probability that student chosen is

(a) Total no. of favorable outcomes= 15+20+10

= 45

Total outcomes= 15+20+10+10+25+20=100

Probability that the student chosen= Total no. of favorable outcomes / Total no.of outcomes

= 45/100

=0.45

(b)Probability that the student chosen is a student of class 8 or 9 = 20+10+25+20 /100

= 75/100

=0.75

(c) Probability that the student chosen is a girl = 10+20+25 / 100

55/100

0.55

(d) Probability that the student chosen is a student of a boy class 8=20/100

=0.20

(e) Probability that the student chosen is of class 7 = 15+10 / 100

= 25/100

=0.25

(f) Probability that a girl chosen is nt studying in class 8 = 10+25 /100

=35/ 100

= 0. 35