The coin we choose is equally likely to be fair or unfair, since the ratio of fair to unfair coins is 2:2 = 1:1.
So, 50% of the times we pick a fair coin, which lands on heads with probability 50%.
The other 50% of the times we pick an unfair coin, which lands on heads with probability 90%.
Since these two events are mutually exclusive (a coin is either fair or unfair), the probability of having the coin to land on heads is
Answer:
The cost of 10 ice-cream cones is <u>40 dollars</u>.
Step-by-step explanation:
Here we have given that the cost of 5 ice-creams cone is 20 dollars. So, finding the cost of 1 ice-cream cone.
Hence, the cost of 1 ice-cream cone is 4 dollars.
Now, we know the cost of 1 ice-cream cone. Thus, finding the cost of 10 ice-cream cones.
Hence, the cost of 10 ice-cream cones is 40 dollars.
Answer:
a)
Step-by-step explanation:
In a study, if we want to measure of establish a relation between two variables, we say that there is a confounding variable when there is a third variable that is having an effect on our original two variables but this third variable wasn't originally measured in our study. Therefore our results are misleading because the relation between our two variables is being influenced by the confounding one.
This is why the correct answer would be the a) An explanatory variable has a great effect on a response variable. And this causes a misleading interpretation between the two variables.
You factor by grouping and the answer is (3x-2)(x+1).
Answer:
k = 6 : 5 : 4
Step-by-step explanation:
BC : AB : AC = 18 : 15 : 12 = 6 : 5 : 4
EF : DE : DF = 12 : 10 : 8 = 6 : 5 : 4
