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2 Statistics

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Question 382

A two-digit access code is generated by choosing each digit independently from 0 to 9, with every digit equally likely. A leading zero is allowed.

a.

Find the probability that the two digits are equal.

[2]
b.

Find the probability that at least one digit is 7.

[2]
c.

For 500 generated codes, find the expected number containing no digit 7.

[2]
Markscheme

2 Statistics Questions

  1. A Level
  2. /Maths
  3. /2 Statistics

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