chemistry

Element x
Isotope 55x 60%
Isotope 56x 30%
Isotope. 57x 10%

55× 60 =3300
56×30=1650
57× 10= 570
Add them up5520
divide by 100
the atomic weight of x is 55.2

Pls check if this is correct , answer and method

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    bobpursley

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