Question

Exercitiul 7. Va roggg ca ma abonez+coroana+multumesc+inimioara+65 puncte; plsss
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Answer 1

a) numarul total va fi egal cu numerele de bilete vandute in fiecare zi adunate

adica 190 de bilete

b) aici ai asa:

$x\% \times 190 = 30 \\ \frac{x}{100} \times 190 = 30 \\ \frac{x}{10} \times 19 = 30 \\ \frac{x}{10} = \frac{30}{19} \\ 19x = 300 \\ x = 15.78$

c) medie aritmetica

$\frac{50 + 40 + 20 \times 3 + 10 + 30}{7} = \frac{190}{7} = 27$

d) probabilitate

total =190

favorabil= 20

probabilitate=

$\frac{20}{190} = \frac{2}{19}$

e)

$100 \times 15 + 90 \times 20 = 3300lei$