Q20 of 55 Page 623

Each question consists of two statements, namely, Assertion(A) and Reason (R) . Choose the correct options.

Assertion (A)

Reason (R)

The probability of a sure event is 1.

Let E be an event. Then 0<P (E ) <1.

Here always the probability of a sure event is 1

and

P(E), where E is some event, always ranges between 0P (E ) 1.

A coin is tossed 60 times and the tail appears 35 times. What is the probability of getting a head?

Each question consists of two statements, namely, Assertion(A) and Reason (R). Choose the correct options.

Assertion (A)	Reason (R)
In a cricket match a batsman hits a boundary 9 times out of 45 balls he plays. The probability that in a given throw he does not hit the boundary is	P (E ) +P (not E) =1

Fill in the blanks

(i) probability of an impossible event = ____________

(ii) probability of a sure event = ____________

(iii) Let E be an event. then p(not E) = ____________

(iv) p (E) +P (not E) = ____________

(V) P (E) lies between ____________ and ____________

The marks obtained by 90 students of a school in Mathematics out of 100 are given as under:

Marks	0-20	20-30	30-40	40-50	50-60	60-70	70 and above
No of students	7	8	12	25	19	10	9

From these students, a students is chosen at random.

What is the probability that the chosen student

(i) gets 20% or less marks?

(ii) gets 60% or more marks?

Assertion (A)	Reason (R)
The probability of a sure event is 1.	Let E be an event. Then 0<P (E ) <1.

Each question consists of two statements, namely, Assertion(A) and Reason (R) . Choose the correct options.Assertion (A)Reason (R)The probability of a sure event is 1.Let E be an event. Then 0<P (E ) <1.