Can someone help me figure this out? I thought the average might be percent wise but when I did the problem I got lost..

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Question

Can someone help me figure this out? I thought the average might be percent wise but when I did the problem I got lost..

http://prntscr.com/7e99e0

anonymous · Answer

@divu.mkr

anonymous · Answer

@Learner11

anonymous · Answer

idk sorry

anonymous · Answer

bating average is something like how many average hit you will make of each throw
like as if you were thrown of 4 ball and you were able to hit only one then you bating average will be 0.25
you  have just multiply the batting average to the total number of ball to get successful hits

anonymous · Answer

ooh

anonymous · Answer

could you explain to me how to set it up?

anonymous · Answer

@Learner11

phi · Answer

The idea is to "interpret" this line:
batting average is a ratio  of   hits to times at bat
we can write a ratio as a fraction
$$ batting\ avg = \frac{hits}{times\ at\ bat} $$

phi · Answer

Once you get that idea, you read the problem for info.
Do we know the batting average (as a number) ?
do we know the number of hits  or the times at bat?

any ideas?

anonymous · Answer

So I turn the a
verage into a fraction and then do proportion?

phi · Answer

you see the "equation"  I posted ?
replace the "words"  with numbers  (as much as you can, from reading the problem)
can you do that ?

anonymous · Answer

Yeah

phi · Answer

what do you get ?

anonymous · Answer

.320 = x/25 ?

phi · Answer

yes.  now we need to find "x"  (i.e. number of hits)
to "solve for x"  the trick is to multiply both sides by 25, like this
$$ 0.320 \cdot 25 = \frac{x}{25} \cdot 25 $$

anonymous · Answer

x=8

phi · Answer

on the right side the 25/25  is 1  (cancels out)

phi · Answer

yes, number of hits is expected to be 8

anonymous · Answer

Would it also work if I turned .320 into a fraction and crossed multiplied?

anonymous · Answer

with x/25

phi · Answer

yes, you can cross multiply.  you could write 0.320 as  0.320/1
or
320/1000
or 32/100

I remember liking cross multiplying (easy to remember), but it's faster to do it the way I showed  (and the way you will learn to solve equations if you take more math classes)

anonymous · Answer

Oh I see :3 I just asked because that's what I was being taught at the moment. But I understand now ^.^

anonymous · Answer

Thank you so much c:

phi · Answer

yw