
By: geniuskids (offline) Sunday, August 18 2013 @ 04:38 AM CDT (Read 628 times)



geniuskids 
Hi there, pls help me with this question:
Q1): Harry and Sally were at a party. Harry shook hands with 4 times as many boys as girls while Sally shook hands with 5 times as many boys as girls. How many boys and how many girls were at the party?
Answer is 25 boys, 6 girls.
Q2) Tony had 15% more 50cents coins than 20cents coins. If there were 6 more 50cents coins than 20cents coins, how much money did Tony have?
Answer is $14.90 but my answer is $31.
Kindly explain the above concepts to me. Tx

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Registered: 11/12/11 Posts: 169





By: echeewh (offline) Sunday, August 18 2013 @ 05:00 AM CDT



echeewh 
Hey <geniuskids>,
Your answer of $31 for Q2 appears correct. Thank you.
Following is my worked solution for Q1:
Q1.
***  for alignment purpose
<H (B ) shook hands with others>
B : G * Total
4 : 1 **** 5 **  (1)
<S (G) shook hands with others>
B : G * Total
5 : 1 **** 6 **  (2)
Apply <Unchanged Total> concept to the ratios given as the total number of other children (boys + girls) in the party remains the same. In doing so, multiply (1) 6x; (2) 5x.
<H (B ) shook hands with others>
B : G * Total
24 : 6 ** 30 **  (3)
<S (G) shook hands with others>
B : G * Total
25 : 5 ** 30 **  (4)
Therefore,
B = 25
G = 6
=========
Trust this help.
Do let me know again if there's further clarifications.
Cheers,
Edward

Active Member
Registered: 04/21/11 Posts: 623





By: geniuskids (offline) Monday, August 19 2013 @ 04:14 AM CDT



geniuskids 
Hi Edward,
Thank you for your help! Now I understand!
Cheers

Active Member
Registered: 11/12/11 Posts: 169



