Question

a bag contains 6 blue marbles 5 yellow marbles 3 white marbles and 1 red marble. what is the probability of not selecting a white marble

Answer 1

Answer:

probability: 4/5

Explanation:

total marbles: 6 + 5 + 3 + 1 = 15 marbles

\\ not picking white marbles means, picking other marbles except white \\

solve:

$\hookrightarrow \sf \dfrac{15-3}{15}$

$\hookrightarrow \sf \dfrac{12}{15}$

$\hookrightarrow \sf \dfrac{4}{5}$

Answer 2

Answer:

$\frac{4}{5}$

Based on the given conditions, formulate:

$1-\frac{3}{6+5+3+1}$

Calculate the sum or difference

$1-\frac{3}{11+3+1}$

$1-\frac{3}{14+1}$

$1-\frac{3}{15}$

Cross out the common factor

$1-\frac{1}{5}$

Find common denominator and write the numerators above common denominator

$\frac{5}{5}-\frac{1}{5}$

Write the numerators over common denominator

$\frac{5-1}{5}$

Calculate the sum or difference

$\frac{4}{5}$

I hope this helps you

:)