Aman has 25 marbles more than half of the marbles that Rajiv has. If Aman has 40 marbles ,how many marbles does Rajiv have ?

Step-by-step explanation: lets say, rajiv has x marbles.

given: aman has 40 marbles

           and aman's marbles are 25 more than half of rajiv's marbles.

so, aman has 25 + x/2 marbles

    40 = 25 + x/2

    40 - 25 = x/2

    15 = x/2

    15*2 = x

    30 = x

thus, rajiv has 30 marbles.                  

for the first question it would be the second answer for the second question it would be the third answer and for the third question it would be the first answer

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.