In a class of 42 students. 3 students use spectacles. Complete the following activity to find probability of a student, selected at random, wearing spectacles.

In a class of 42 students in Model High School, 3 students use spectacles. Fill in the boxes to find the probability of a student selected at random is wearing spectacles. rArr The total number of studentd in the class is 42. thereforen(S)=square Let A be the event that a student uses spectacles. thereforen(A)=square P(A)=square" "thereforeP(A)=square

In a class of 125 students 70 passed in Mathematics, 55 in statistics, and 30 in both. Then find the probability that a student selected at random from the class has passed in only one subject.

In a class of 125 students 70 passed in Mathematics,55 in statistics,and 30 in both. Then find the probability that a student selected at random from the class has passes in only one subject.

In a class of 125 students 70 passed in Mathematics, 55 in statistics, and 30 in both. Then find the probability that a student selected at random from the class has passed in only one subject.

In a class of 125 students 70 passed in Mathematics, 55 in statistics, and 30 in both. Then find the probability that a student selected at random from the class has passes in only one subject.

In a class of 125 students 70 passed in Mathematics, 55 in statistics, and 30 in both. Then find the probability that a student selected at random from the class has passes in only one subject.

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : Generally Which type of spectacles do most of the students use ?

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : What defect of eyesight do most of the students suffer from?

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : Give two possible reasons for the above defect in 8 students?

Answer the following questions : In a std. X Class , out of 40 students , 10 students use spectacles, 2 students have posotive power and 8 students have negative power of lenses in their spectacles. Answerthe following question : What does the positive power indicate ?