See image for question. Please show workings.
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Add the fractions, and simply the result to lowest terms. 2/3 + 2/7= ?

Indicate the formula for the following conditions: p^c(n, r)=

Afactory buys 10% of its components from suppliers b and the rest from supplier c. it is known that 6% of the components it buys are faulty. of the components brought from suppliers a,9% are faulty and of the components bought from suppliers b, 3% are faulty. find the percentage of components bought from supplier c that are faulty.