melinasilerox9mjh
26.06.2019 •
Mathematics
Point estimates are defined for both samples and populations
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Ответ:
N=0.8L
N=L-80
Since N=N
0.8L=L-80 subtract 0.8L from both sides
0=0.2L-80 add 80 to both sides
80=0.2L divide both sides by 0.2
400=L, and since N=L-80
N=320
N+L=400+320
So they have 720 baseball cards altogether.