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Can you find the probability of unusability using the 320 bolts with 30 of them unusable?
320 * 30?
No, it's the same formula as last time.
(number of unusable/total number)*100
@JoannaBlackwelder Well 30 were unusuable it said and the total number was 14,000, so it's 30 / 14,00 * 100?
We don't know how many are unusable when we have 14,000 total. That is what we are looking for. But we have both numbers when the total is 320 and the number unusable is 30.
Ok, so then it would be 30/320 right?
Right, *100 :-)
And then that is 0.09 and I would times that by 100 ?
And that's 9.37
Yep, I get 9.375 to be precise. :-)
Lol, right, so then...is there another step? To get it to be one of the answers?
Then we can use that value in the same formula, but when the total is 14,000
So, 9.375=(number unusable/14,000)*100
See how I wrote that formula?
Lol, not really...I got 0.066
It is probability = (number unusable/total number)*100
How did you get .066?
I did 9.375 / 14000 * 100
No, the 9.375 is the probability, not the number of unusable.
|dw:1432918347029:dw| Any ideas how to solve?
Oh, okay, so...30 is still the number of unsuable then I divide that by 14000 and times it by 100?
No, the number unusable is what we are solving for in the equation I wrote above.
No, the 14000 is in the denominator and 100 is in the numerator, so we don't multiply those.
Oh so 100 divided by 14000 which is 0.007?
To clear the fraction, we can multiply both sides by 14000|dw:1432918686742:dw|
Yeah, we could do it that way too. :-)
Can you finish solving for unusable?
Yeah, so rounding it up it would be 1, 313? unusable Right?
@JoannaBlackwelder Thank you kindly for your help, and also for being so patient, lol as you can see I'm really not the best at math. XP :)
No worries. It takes practice. :-) Happy studies!