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$9$China has 1.2 billion people. Marketers want to know which international brands they have heard of. A large study showed that $62\%$ of all Chinese adults have heard of Coca-Cola. You want to simulate choosing a Chinese at

random and asking if he or she has heard of Coca-Cola. One correct way to assign random digits to simulate the answer is:

(a) One digit simulates one person鈥檚 answer; odd means 鈥淵es鈥� and even means 鈥淣o.鈥�

(b) One digit simulates one person鈥檚 answer; $0$to $6$mean 鈥淵es鈥� and $7$to $9$mean 鈥淣o. 鈥�

(c) One digit simulates the result; $0$to tells how many in the sample said 鈥淵es.鈥�

(d) Two digits simulate one person鈥檚 answer; $00$ to $61$ mean 鈥淵es鈥� and $62$ to $99$ mean 鈥淣o. 鈥�

(e) Two digits simulate one person鈥檚 answer; $00$ to $62$ mean 鈥淵es鈥� and $63$ to $99$ mean 鈥淣o. 鈥�

Step by step solution

01

Step 1. Given

China has a population of $1.2$ billion people. Coca-Cola has been heard of by $62\%$ of the population.

02

Step 2. Concept

The probability of an event=$\frac{numberoffavourableoutcomes}{totalnumberofoutcomes}$

03

Step 3. Calculation

Because it is showing the options $00$ to $61$, the assignment could be completed by selecting option (d) because $00$ is being counted as one of the $62$ percentage points that have said yes.

As a result, the best solution is (D).

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