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GMAT695
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Join GMAT Statistics Masterclass EP2 - Standard Deviation, Correlation, Variance https://www.youtube.com/watch?v=q-sXzFHqnQI
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I need very difficult math questions.. where I can find those?
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I’m planning on taking the gmat and i really need a good refresher for the quant questions. I haven’t done math like this in a while :( What would be the best resources for me to use?
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A family of seven members consists of a father, a mother and five children. They have to stand in a queue for check-in of their luggage at the airport. The father is concerned about the safety of his youngest child, Aaron. So, he wants to stand behind Aaron in the same queue. The mother insists on standing behind the father. In how many ways can the seven family members arrange themselves in a queue such that the concerns of both father and mother are addressed?

A. 210
B. 420
C. 720
D. 840
E. 960

Hey can anyone help me with this question and why is it not c ?
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Bibhav
A family of seven members consists of a father, a mother and five children. They have to stand in a queue for check-in of their luggage at the airport. The father is concerned about the safety of his youngest child, Aaron. So, he wants to stand behind Aaron in the same queue. The mother insists on standing behind the father. In how many ways can the seven family members arrange themselves in a queue such that the concerns of both father and mother are addressed?

A. 210
B. 420
C. 720
D. 840
E. 960

Hey can anyone help me with this question and why is it not c ?


Discussed here: https://gmatclub.com/forum/7-people-a-b ... 80985.html

Similar questions to practice:
https://gmatclub.com/forum/mother-mary- ... 86407.html
https://gmatclub.com/forum/six-mobsters ... 26151.html
https://gmatclub.com/forum/in-how-many- ... 91460.html
https://gmatclub.com/forum/goldenrod-an ... 82214.html
https://gmatclub.com/forum/meg-and-bob- ... 58095.html
https://gmatclub.com/forum/7-people-a-b ... 80985.html

Hope it helps.
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Bibhav, the question is discussed here
a-family-of-seven-members-consists-of-a-father-a-mother-and-five-chil-397952.html?srsltid=AfmBOoqOBjvUKwaxLDLHTIEqreJueNgZReSzH_6-ZKu4ZjJGY7utzqxX

Oh my bad, I think there’s no discussion there either 😔

I couldn’t find the exact question. There’s only similar ones. Those should help
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Yeah got the idea tho
thanks
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Problem Solving Butler: November 2024
November 27PS 1PS 2
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The time taken to complete an order decreases
by 8 seconds to 12 seconds; what is this decrease
expressed as an improvement in the efficiency of
fulfilling the order

Please I need help
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The options are 16%, 20%, 40%, 60%
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Decreases by 8 sec to 12 means total time 20 sec, so efficiency increased by 8/20*100 = 40%
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Thanks a lot

Under load a rope stretches 25% and is now 300
metres long; how long was the rope before the
load was applied?
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125% = 300 so 100% = 240 in short way
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Question- A’s Salary is 37.5% less than B, By what % is B more than A?

How to solve this
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