Answer: 3) 0.8493
Step-by-step explanation:
Given : Red Bull GmbH (the parent company) has observed that daily sales are normally distributed with an average of 7,421,143 drinks sold with a standard deviation of 6,974.621.
i.e.

Let x denotes the daily sales .
Then, the probability that on a given day below 7,428,350 drinks are sold would be :

Hence, the correct answer is 3) 0.8493
The given equation is (1/2)a + (2/3) b = 50
and b = 30
Substituting the given value of b is above the equation we get



Therefore, a = 60 and b = 30 is a solution of the given equation.
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