RATIO and PROPORTION | How many pencils are there in a shop? ratio of boys to girls is 4:3?

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1.) The ratio of pens and pencils in a shop is 3:2 respectively. If the average number of pens and pencils is 180, how many pencils are there in a shop?
A. 128 pencils
B. 136 pencils
C. 144 pencils
D. 150 pencils
E. 156 pencils

2.) A group of social work form with 64 boys and 40 girls. During their membership drive, the same number of boys and girls joined the group. How many members does the group have now if the ratio of boys to girls is 4:3?
A. 168 members
B. 172 members
C. 176 members
D. 180 members
E. 184 members

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Thank you mam leonalyn..🥰 sana makapasa po ako sa civil this March 26..

villarealmariz
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Thank you so much ma'am leonalyn🥰❤️

ellamendez
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Hi Ma'am Leonalyn. Ask ko lang po na, automatic po ba na may over 2 kapag may hinahanapan na ration like sa number 1 question?

jhoonggaming
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SANA PO MAKATULONG

NO. 1

LET:
PEN = PN
PENCIL = PL

(PN + PL)/2 = 180
PN + PL = 360
PN = 360 - PL

3/2 = PN/PL
3/2 = (360 - PL)/PL
3PL = 2(360 - PL)
3PL = 720 - 2PL
5PL = 720
PL = 144 ✓

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