Question

@hwyl

Answer 1

@hwyl

Answer 2

http://prntscr.com/8kjg2c

Answer 3

mass of bean group=average mass of one bean x number of each bean group

So
375.91/243=
132.85/185=
227.35/192=

Percent abundance=number of specific bean group/ total number of all bean group
243/(243+185+192) for the first one.
You can do the two others.
It'll eventually add up to 100%

Multiply the answer you got from 6 and 7
(Average mass)(Percent abundance) for the 3 and add it together to find your total.

Answer 4

do you still need help?

Answer 5

No.
And thank you @Shalante :)

Answer 6

No problem!
Good luck on the rest.