Mathematics, 14.02.2021 09:40 red21120p718de

Assume that when adults with smartphones are randomly selected, 61% use them in meetings or classes .if 30 adult smartphone users are randomly selected, find the probability that exactly 23 of them use their smartphones in meetings or classes

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1. ∠1 is complementary to ∠2 and ∠3 is complementary to ∠2. subtraction property of equality 2. m∠1 + m∠2 = 90 and m∠3 + m∠2 = 90 substitution 3. m∠1 + m∠2 = m∠3 + m∠2 definition of complementary 4. m∠1 = m∠3 given

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