Question

i know the answer just not how to do it (AP stats)

A mathematics competition uses the following scoring procedure to discourage students from guessing (choosing an answer randomly) on the multiple choice questions. for each correct response the score is 7 for each question left unanswered the score is 2 for each incorrect response the score is 0 if there are 5 choices for each question what is the minimum number for choices that the student must eliminate before it is advantageous to guess among the rest?

Answer 1

@ganeshie8 @nincompoop

Answer 2

@ParthKohli any clues?

Answer 3

the answer is 2 if that helps

Answer 4

@zepdrix

Answer 5

@bibby @superdavesuper

Answer 6

looks like it is by looking at the Expected score by eliminate 0, then 1 and then 2 choices until the Expected score is >2; see the cal'n on P.2 here:

http://jdanforth.weebly.com/uploads/1/2/3/7/12370684/chp_5__6_key.pdf

Answer 7

wow okay thanks

Answer 8

welcome - u can thank google 4 the search lol

Answer 9

should of tried that i figured my teacher wrote the questions but guess i was wrong :P