25 out of 50 students in a class passed a math test. what percent of students failed the math test?

25 out of 50 students in a class passed a math test. What percent of students failed the math test? => 60% or 55% or 45% or 50%..

From a class of 32 students, 4 are to be chosen for a competition. In how many ways can this be don..

Question: From a class of 32 students, 4 are to be chosen for a competition. In how many ways can this be done? Answer: We are to select 4 students from 32. This selection can done in ..

We are to select 4 students from 32. This selection can done i..

then show that (A+B)+C = A+(B..

Question: Five balls of different colours are to be placed in three boxes of different sizes. Each box can hold all five balls. In how many different ways can we place the balls so that no box remains empty? Answer: Given 5 balls can be placed in 3 boxes as follows: i. 1 ball can be pl..

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These can be inserted between a and b. b. To find the sum of n arithmetic means between the two given quantities: Let the two quantities (numbers) be a and b. The required sum = A 1 + A 2 + A 3 + ---- + A..

Question: Answer: ..

Find the adjoint of the matrix. ..