Military selected Student review for sk sir

Washington High School randomly selected freshman, sophomore, junior, and senior students for a survey about potential changes to next year’s schedule. Of students selected for the survey, 1/4 were freshmen and 1/3 were sophomores. Half of the remaining selected students were juniors. If 336 students were selected for the survey, how many were seniors ?

In a certain college, 4% of boys and 1% of girls are taller than 1.75 metres. Furthermore, 60% of the students in the college are girls. A student is selected at random from the college and is found to be taller than 1.75 metres. Find the probability that the selected student is a girl.

In a certain college, 4% of boys and 1% of girls are taller than 1.75 metres. Furthermore, 60% of the students in the college are girls. A student is selected at random from the college and is found to be taller than 1.75 metres. Find the probability that the selected student is a girl.

In a class of 60 students, 40 opted for NCC, 30 opted for NSS and 20 opted for both NCC and NSS. If one of these students is selected at random, then the probability that the student selected has opted neither for NCC nor for NSS is

There are 60% students in Maths and 30% in Biology. If 10% students are in both subjects. Find the probability that a randomly selected student has Maths or Biology.

In a class of 60 students 30 opted for NCC, 32 opted for NSS and 24 opted for both NCC and NS. If one of these students is selected at random, find the probability that: The student opted for NCC or NSS.

In a class of 60 students, 30 opted for NCC, 32 opted for NSS and 24 opted for both NCC and NSS. If one of these students is selected at random, find the probability that(i) The student opted for NCC or NSS.(ii) The student has opted neither NCC nor NSS.(iii) The student has opted NSS but not NCC.

In a class of 25 students with roll numbers 1 to 25 , a students is pecked up at random to answer a question .Find students with roll numbers 1 to 25 , a student is picked up at random to answer a question . Find the probability that roll number of the selected students is either a multiple of 5 or 7.

There are n students in a class. Ler P(E_lambda) be the probability that exactly lambda out of n pass the examination. If P(E_lambda) is directly proportional to lambda^2(0lelambdalen) . If a selected student has been found to pass the examination, then the probability that he is the only student to have passed the examination, is

In a class of 60 students, 30 opted for NCC, 32 opted for NSS and 24 opted for both NCC and NSS. If one of these students is selected at random. (i) Find the probability that student opted for NCC or NSS. (ii) Probability that the student has opted neither NCC nor NSS.