1) a. A mobile phone shop has 7 colors of iPad, 8 colors of HCT mobile phones and four colors of headphone. In how many ways a customer can choose two iPad or three HCT mobiles with a headphone. b. If °Pr+1 = 3024, find the value of r.

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A: Explanation of the solution is given below...

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Statements and Logic

Logic is the analysis of general patterns of thoughts without regard to any specific sense of context.