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Biology a level help
Help
Help I don’t get how to do this… the correct answer is 2000 as it’s says on the paper but I don’t get how.
I got 2000000
I did:
10:90 (10+90=100)
basically this q^
Help I don’t get how to do this… the correct answer is 2000 as it’s says on the paper but I don’t get how.
I got 2000000
I did:
10:90 (10+90=100)
(edited 2 years ago)
Reply 1
Can you show the full question please?
Reply 2
15
Original post by humble heroics
Can you show the full question please?
It’s work out the original number of bacteria in the sample
Reply 3
Each dilution is 1:10 so working backwards: 2 x 10 = 20 (1st dilution), 20 x 10 = 200 (2nd dilution), 200 x 10 = 2000 (3rd dilution)
Reply 4
15
Original post by humble heroics
Each dilution is 1:10 so working backwards: 2 x 10 = 20 (1st dilution), 20 x 10 = 200 (2nd dilution), 200 x 10 = 2000 (3rd dilution)
Ahh so that ratio we cancel down ok thanksss
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