Question

The first digits of data entries in most real-world data sets are not uniformly distributed. The most common first digit is 1, followed by 2, and so on, with 9 being the least common first digit. This phenomenon is known as Benford's Law.
The table below is the probability distribution for Benford's Law where the random variable D represents the first digit in a data entry.

What is the probability that a randomly selected data entry has a first digit greater than 7?

Answer 1

Answer:

Answer from Khan academy 0.477

Step-by-step explanation:

Answer 2

The probability will be "0.477".

According to the given data,

• Probability of D1 = 0.301
• Probability of D2 = 0.176

By adding the probabilities, we get

→ $P (D \leq = 2) = 0.301+0.176$

                     $= 0.477$

Thus the response above is appropriate.

Learn more about probability here:

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