There are 5 blue marbles,6 red marbles,2 green marbles and 1 black marble in a jar. You are to pick a marble one at a time.

1.What is the experimental probability of getting not green marble?
a.1/7 b.3/7 c.5/7 d.6/7

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Sagot :

EXPERIMENTAL PROBABILITY

Formula: [tex] \boxed{ \begin{array}{c} \scriptsize \tt P= \frac{number \: of \: times \: an \: event \: occured}{number \: of \: times \: experiment \: is \: repeated} \end{array}}[/tex]

[tex]\\[/tex]

There are 5 blue marbles, 6 red marbles,2 green marbles and 1 black marble in a jar. You are to pick a marble one at a time.

QUESTION:

1. What is the experimental probability of getting not green marble?

SOLUTION:

  • From the given situation, there are 14 marbles in the jar all in all. Thus, the denominator will be 14.
  • There are 12 marbles that are not green, (5 blue, 6 red and 1 black). Thus, the numerator will be 12.
  • Simplify the fraction into lowest terms.

[tex] \qquad \qquad\tt P= \frac{12}{14} \qquad \: \\ \\ \qquad \qquad \tt P= \frac{12}{12} \div \frac{2}{2} \\ \\ \qquad \qquad \green{ \boxed{ \tt P= \frac{6}{7} }} \qquad \: \: [/tex]

[tex]\\[/tex]

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