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 one year ago
Teesha is in the French club. There are 31 students in the club. The French teacher will pick two students at random to guide visiting students from France. What is the probability that Teesha will be picked as a guide? Hint: Teesha must be picked first or second
A. 1/30
B. 30/31
C. 1/930
D. 2/31
 one year ago
Teesha is in the French club. There are 31 students in the club. The French teacher will pick two students at random to guide visiting students from France. What is the probability that Teesha will be picked as a guide? Hint: Teesha must be picked first or second A. 1/30 B. 30/31 C. 1/930 D. 2/31

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hartnn
 one year ago
Best ResponseYou've already chosen the best response.5just solved the same type of question.... http://openstudy.com/users/smokeysthename#/updates/51518fd7e4b0ae0b658be4da

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Thank you hartnn, I'll take a look at that.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5welcome ^_^ if you got any doubts, ask here, we'll clarify it here itself.

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Thank you, will do. :b

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Mhmm Mhmm so I went and looked............ I'm extremely lost o.o lol >.<

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5the probability that Teesha will be picked as a guide means Teesha will be picked on 1st selection AND Teesha will be picked on 2nd selection got this ?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5i would like to revise my previous statement, the probability that Teesha will be picked as a guide means Teesha will be picked on 1st selection and NOT in 2nd(because she's already selected), AND Teesha will be picked on 2nd selection and NOT in 1st.

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Oooooh, so what happens then?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5so, we'll consider 1st case, Teesha will be picked on 1st selection and NOT in 2nd(because she's already selected), 1st selection, teacher has 31 choices, to select teesha, she has 1 option, so, 1/31 2nd selection, teacher now have 30 other choices, and to NOT select teesha, she can pick any of 30 other, so 30/30 so, overall for 1st case, it'll be 1/31 *30/30 got this ?

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0I got it...... 30/930, does it need to be simplified?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.51/31 + 30/31*1/30 = 2/31 how you got 30/930 ??

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Lol............ ooooooh goodness, I multiplied 1/31 *30/30 o.o

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5ohh..for 1st case....30/30 =1 :P i though you've got the final answer.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5ok, did you understand 1st case ? can i move to 2nd case ?

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Yes please, moving on :b

hartnn
 one year ago
Best ResponseYou've already chosen the best response.52nd case, Teesha will be picked on 2nd selection and NOT in 1st., 1st selection, teacher has 31 choices, to NOT select teesha, she has 30 other options, so, 30/31 2nd selection, teacher now have 30 other choices, and to select teesha, she have to pick her, so 1/30 so, overall for 1st case, it'll be 30/31*1/30 = 1/31 got this ?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5since the 2 cases are independent, you'll add them, 1/31 + 1/31 = 2/31

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0So 2/31 * 1/31 would = 2/31 as the answer? Lol, or am I too early?

hartnn
 one year ago
Best ResponseYou've already chosen the best response.51/31 + 1/31 = 2/31 thats why 2/31 is the answer as we considered both the cases.

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Ohhhhhhh lol ok, I understand that now :b

10_CuspofPower_10
 one year ago
Best ResponseYou've already chosen the best response.0Thank you [: You've been fanned lol.

hartnn
 one year ago
Best ResponseYou've already chosen the best response.5thanks for fanning! :D and welcome ^_^
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