there are 35 student in class ix-a, 34 in ix-b, 33 in ix-c.if even roll numbers are alloted for project on chapter 2.polynomials and odd number are allotted for project on chapter 1 number system.what is the probability that the student chosen. i)prepare project on chapter 1?ii)prepare project on chapter 2?
Answers
Answer:
i) 26 / 51
ii) 25 / 51
Step-by-step explanation:
BASIC DATA GIVEN:
No. of students in class 9 A: 35
No. of students in class 9 B: 34
No. of students in class 9 C: 33
Total no. of students in class 9: 35 + 34 + 33
= 102
--
ii) We know that even numbers have to prepare a project on chapter 2 [polynomials].
No. of even roll numbers in class 9 A: 17
No. of even roll numbers in class 9 B: 17
No. of even roll numbers in class 9 C: 16
Total even roll numbers in class 9: 17 + 17 + 16
= 50
P(E) = No. of favourable outcomes/ No. of total outcomes
P(of a student preparing project on chapter 2) = 50 / 102
= 25/51
i) Either you could use the same method as above, but for simplicity, I've used the below method:
P(E) = 1 - P(not E)
= 102/102 - 50/102 [1 = 102/102]
= 52/102
= 26/51
--
Hope this helped you!
#AnswerWithQuality