Answer:
90
Step-by-step explanation:
Think of 5(18) as 5(10+8). This is easily done mentally: 50 + 40 = 90.
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Answer:
Reading bar graphs (multi-step) In a bar graph each bar represents a number. The following bar graph shows the number of seconds that different rides last at the fair. We can tell how long each ride lasts by matching the bar for that ride to the number it lines up with on the left.
Here is an example:
Answer:
Step-by-step explanation:
Here X the no of children suffering from hookworm treated and recovered is binomial because
a) Each child is independent of the other
b) There are only two outcomes
c) The probability for any child to recover is constant as 90% = 0.9
X is Bin (20,0.9)
a) Prob that all 20 will be cured
=P(X=20)=
b) Prob all but 1 will be cured=
c) Prob exactly 18 will be cured

d) Prob exactly 90% will be cured.
=