If & = {1, 2, 3, ..., 9}, A = {1, 2, 3, 4, 6, 7, 8} and B = {4, 6, 8}, then find
verify that :
(a) (An B)' = A' U B'
(b) n(A) + n(A') = n(&)
(C) n(An B) + n((ANB)') = n(&) (d) n(A - B) + n(B - A) + n(A n B) = n(A U B).

Lems1. the following data set represents the scores on intelligence quotient(iq) examinations of 40 sixth-grade students at a particular school: 114, 122, 103, 118, 99, 105, 134, 125, 117, 106, 109, 104, 111, 127,133, 111, 117, 103, 120, 98, 100, 130, 141, 119, 128, 106, 109, 115,113, 121, 100, 130, 125, 117, 119, 113, 104, 108, 110, 102(a) present this data set in a frequency histogram.(b) which class interval contains the greatest number of data values? (c) is there a roughly equal number of data in each class interval? (d) does the histogram appear to be approximately symmetric? if so,about which interval is it approximately symmetric?

Ling listed all of the factors of a mystery number: 1,2,4,8,16,32 what is the mystery number?

Ascatter plot with a trend line is shown below. which equation best represents the given data? y = x + 2 y = x + 5 y = 2x + 5