anonymous
  • anonymous
during the repair of a large number of car engines, the spark-plugs were changed in 70% and the air-filter in 45% of case, and that both parts were changed 31.5% of case so - is the replacement of spark-plugs independent of the replacement of the air filter? and reason ? -find the probability that in repairing an engine for which the spark-plugs have been changed it with also be necessary to replacement the air-filter?
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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kropot72
  • kropot72
Let the replacement of spark-plug be event A and the replacement of the air-filter vbe event B. Events A and B are independent if (and only if) the following is true: \[P(A \cap B)=P(A) \times P(B)\] In this case \[P(A \cap B)=0.315\] P(A) = 0.7 and P(B) = 0.45 Can you now find whether or not the events are independent?
kropot72
  • kropot72
air-filter be event B*
kropot72
  • kropot72
\[P(A) \times P(B)=0.7\times 0.45=you\ can\ calculate\]

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kropot72
  • kropot72
@mannuvirk90 Are you there?

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