Question

A jar having 18 marbles, each of which some are blue, some are green and some are white. The probability of selecting a blue marble at random is and probability of selecting a green marble at random is then number of white marbles are?

Answer 1

let the number of marbles be x

x+ x+ x=18

x= 6

• Probability = 6
• $18 \div 6$
• 3