Answer:
std dev = 0.625
Step-by-step explanation:
Given that weights of bags of potato chips coming from a factory follow a normal distribution with mean 12.8 ounces and standard deviation .6 ounces.
We must change std deviation such that
P(X<12) =0.01
Mean would remain the same as 12.8 oz
From normal distribution score we can find
10th percentile is -1.28\
i.e. we must have
Std deviation should be 0.625
0.44 is equivalent to 11/25 .......
√(126.x.y⁵)/(32x³)
1st- simplify by (2x) == √(63.y⁵)/(16.x²)
2nd- Or it could be written √(9.7.y⁴.y)/(16x²)
3rd: (3y²/4x) . √7y (3rd Answer)
$90 ×.06=5.40
$95.40×.20=19.08
95.40+19.08=114.48
114.48/3=38.16
Each person pays 38.16
check your work 38.16×3=$114.48
You pay $38.16 for your bill unless your friends stiff you.