Mathematics, 17.02.2021 15:10 kalestalker10

if S1={1,2,3,4,5,6,7,8,9,10,11,12,13,1 4,15,16,17,18,19,20}, S2={a, b,c, d}, S3={b, d,e, f}.The number of elements of (S1×S2) U (S1×S3) is

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if S1={1,2,3,4,5,6,7,8,9,10,11,12,13,1 4,15,16,17,18,19,20}, S2={a, b,c, d}, S3={b, d,e, f}.The numb...

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if S1={1,2,3,4,5,6,7,8,9,10,11,12,13,1 4,15,16,17,18,19,20}, S2={a, b,c, d}, S3={b, d,e, f}.The number of elements of (S1×S2) U (S1×S3) is​

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if S1={1,2,3,4,5,6,7,8,9,10,11,12,13,1 4,15,16,17,18,19,20}, S2={a, b,c, d}, S3={b, d,e, f}.The number of elements of (S1×S2) U (S1×S3) is