If each of the students in a certain mathematics class is either a junior or a senior, how many students are in the class?
(1) If one student is to be chosen at random from the class to attend a conference,the probability that the student chosen will be a senior is 4/7.
(2) There are 5 more seniors in the class than juniors.
OA C
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From 1 we can conclude
Total student =7x
number of seniors=4x..does not provide an absolute value ..hence not sufficient
From 2..total student=2*total senior-5...does not provide an absolute value ..hence not sufficient
combining
7x=8x-5 or x=5
so total number of student=7*5=35
Ans option C
please post DS question under DS thread
Total student =7x
number of seniors=4x..does not provide an absolute value ..hence not sufficient
From 2..total student=2*total senior-5...does not provide an absolute value ..hence not sufficient
combining
7x=8x-5 or x=5
so total number of student=7*5=35
Ans option C
please post DS question under DS thread
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