Read all instructions carelully. Make sure all questions are answered Show all w

Question

Read all instructions carelully. Make sure all questions are answered Show all work for credit (Credit is onlr gven if work is provided Use the appropriate notation for your answers Rounding: Leave your aswer in fraetion form or round to 2 decimal places 1. A survey classifies teenagers by gender and favorite social media site Facebook Twitter Instagram 36 32 400 Male Gender Female 152 61000 If one teenager is selected at random from this population, determine the following a) ) The probability the selected teenager prefers Instagram. b) () The probability the selected teenager is female c) 2) The probability the selected teenager is not female oe/10000.40 d) 2) The probability the selected teenager prefers Instagram or is female. probability the selected teenager prefers Instagram and is a female 52-/600 5 0) 2) The probability the selected teenager prefers Instagram given the teenager is female.

Explanation / Answer

Ans d is incorrect

d.

P(prefers Instagram OR female) = P(prefers Instagram)+P(female) - P(prefers Instagram OR female)

= (184+600-152)/1000 = 0.63

f.

P(prefers Instagram | Female) = 152/600 = 0.25

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