Posted by **joel** on Thursday, September 22, 2011 at 12:09pm.

The average mass of half the number of crabs in a basket is 350g, the average mass of the remaining crabs is 300g. If the total mass iof the crabs in the basket is 13kg, how many crabs are there in the basket?

- maths urgent -
**oi**, Thursday, September 22, 2011 at 12:54pm
350+300=650g

13kg=13000g

13000/650

=20crabs

- maths urgent -
**Reiny**, Thursday, September 22, 2011 at 1:08pm
let number of crabs be x

mass of 1/2 the craps

= 350(x/2) =175x

mass of remaining ones = 300(x/2) = 150x

175x + 150 = 13000

325x = 13000

x = 40

there were 40 crabs

check:

half of 40 = 20

so 20(350) + 20(300) = 13000

oi's answer makes no sense and does not check out.

## Answer This Question

## Related Questions

- nature - if i get two new hermit crabs that lived in a tank from outside can ...
- nature - please help me. there arre these little black flying bugs in my hermit ...
- math - - Three hockey teams, the Crabs, the Eels, and the Seals, played each ...
- math - - Three hockey teams, the Crabs, the Eels, and the Seals, played each ...
- English - Hermit crabs rely on a supply of empty mollusk shells that they ...
- English - Arthropoda Chelicerata Merostomata (horseshoe crabs) Arachnida (...
- science - Arthropoda Chelicerata Merostomata (horseshoe crabs) Arachnida (...
- English - Arthropoda Chelicerata Merostomata (horseshoe crabs) Arachnida (...
- Biology - How are soldier crabs useful to us and what things are humans doing to...
- physics - You are holding a shopping basket at the grocery store with two 0.68- ...

More Related Questions