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Hi, Emily cud you explain part B on the number of pears

Ty

This for yr explanation!

This question is the simpler or starting chapter on ratio. Question is plain and straight 4ward

Hi. Oranges: 20u=120, so 1u=120÷20=6. Pears at first: 8u=8×6=48. Pears in the end: 48+28=76=2p. Lemons in the end: 3p=76÷2×3=114. Good lemons at first: 15x6-64 = 26 Lemons bought: 114-26 = 88.

Hi Emily Teo, you're correct. I just didn't do the last step. Sorry for the confusion!

P5 or P6 qn?

Used for data analysis. Join us at "Singapore secondary and jc mathematics" group

standard deviation is used in six sigma quality, an attempt in perfection or reducing variation in the manufacturing process.

I tot this is PSLE maths... If possible do not post secondary level qns here...pls join the secondary maths group..

Yes.please do

Change 4:1 to its equivalent of 20:5 for simplicity in calculations. 1 x 2/5 gives you calculation nightmare for the next few steps so change the ratio. Next, take 20 to be 20 units representing the English books and 5 units to represent Mother Tongue books. Calculate 20 x 3/4 and 5 x 3/5 to find the units of books that represent the books not loaned out. You will get 15 units and 3 units of books remaining in the library. 18 units in the library in the end represent 1620 books left in the library. Divide 1620 by 18 and you get 90 books for each unit. Then, multiply 90 by 20 units and you get the amount of English books at first. :)

Thks

For visual learners...

Thks

First subtract the white and black beads taken from the total. Next, divide the remaining total of beads by 2 to find the number of white beads in the end. Lastly, add this number to the white beads taken out at first to find the total amount of white beads at first. :)

Thanks but the 58 white beads were added not taken hence why is it subtracted from the total?

I made an error. Instead of subtracting the 58 white beads from the total at first, add them to the total at first. Then, after adding the white beads and subtracting the black beads from the total, divide the amount by 2. This is the remaining amount for the white bead. Last, subtract the number of white beads, which is 58, from this remaining amount to get the number of white beads at first. Thank you for pointing out this info. ;)

The answer is between 90 to 95. :)

Thanks Brandon for your advise. Understood.