stefan sells jin a bicycle for $126 and a helmet for $17. the total cost for jin is 130 % of what stefan spent originally to buy the bike and helmet. how much did stefan spend originally? how much money did he make by selling the bicycle and helmet to jin?

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Stefan originally spent $110

Stefen made $33 by selling the bicycle and helmet to jin.

Step-by-step explanation:

let ,

the original cost of bicycle and helmet for Stefan be 'x'

now,

total cost for Jin of bicycle and helmet = 126 + 17

                                                        = 143

also, total cost for Jin = 130% of original cost for Stefan

⇒ 143 =

⇒ x = 110.

hence,

profit made by Stefan = total cost for Jin - original cost for Stefan

                                     = 143 - 110

                                     = 33

if you explain the the question more correctly i might be able to answer this better

step-by-step explanation:

a) one student is chosen from classroom a, then a student is chosen from classroom b.  

step-by-step explanation:

independent events are ones in which the probability of one event does not affect the probability of the second event.

one student is chosen from classroom a; this does not affect the chances of choosing a student from classroom b.   this makes these independent events.

when one card is chosen from a standard deck and then set aside before a second card is chosen, the probability of the second card being chosen changes.   this makes them dependent events.

when one student is chosen from classroom a and then a second student is chosen from classroom a, the probability of choosing the second student changes.   this makes them dependent events.

when a letter is chosen from the alphabet and then a second letter is chosen, the probability of choosing the second letter changes.   this makes them dependent events.