200 students appeared in an examination. If 25% of student passed the examination, find the number of student who failed in the examination a. 150
b. 100
c. 275
d. 175

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Wrote and expression for the difference of p and 4

Let u = {q, r, s, t, u, v, w, x, y, z} a = {q, s, u, w, y} b = {q, s, y, z} c = {v, w, x, y, z}. list the elements in the set. a ∩ (b ∪ c)a) {q, s, w, y}b) {q, y, z}c) {q, s, u, w, y, z}d) {q, r, w, y, z}

How can you check that you have correctly converted frequencies to relative frequencies?