answer:
61.712
Step-by-step explanation:
60 feet = 18.288
left wire = 80-18.288 = 61.712
Pupils that chose Band: 60%
Pupils that chose Chorus: 40%
Boys in band: 70%
Boys in chorus: 30%
Probability of choosing boy = Probability of boy in band + Probability of boy in chorus
P = 0.6 x 0.7 + 0.4 x 0.3
P = 0.54
The answer is D.
Do you think it could be 'rho' (density)? Like the thing you use for calculating pressure in fluids?
...or maybe it's just a fancy P.
18 * 100 / 36 = 200
<span>36% of 50 is 18</span>
