Is known that a box of 800 electric bulbs contains 36 defective bulbs. One bulb is taken at random out of the box. What is the probability that the bulb chosen is nondefective?

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:

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?

The table given below shows the ages of 75 teachers in a school.

Note Here 18-29 means from 18 to 29 including both. A teacher from the school is chosen at ramdom. What is the probability that the teacher chosen is

(i) 40 years or more then 40 years old?

(ii) 49 years or less then 49 years old?

(iii) 60 years or more then 60 years old?

There are 600 electric bulbs in a box out of which 20 bulbs are defective. If one bulb is chosen at random from the box. What is the probability that the chosen bulb is defective?