For probability, the numerator is the number of options for the specified property (red card/drawing a queen) and the denominator is the total number of options (in this case 52).
There are 26 red cards in a deck, the the probability of choosing a red card is or .
There are 4 queens in a deck, so the probability of choosing a queen is or .
To find the probability of getting these both, multiply the results, giving .
As the cards are being drawn with replacement, the events are independent. Thus we can find the probability by multiplying the probability of individual events.
There are 4 queens in a pack of 52 cards. So, probability of drawing a queen= 4/52=1/13
There are 26 red cards. So, probability of drawing a red card= 26/52=12
Question 1: 5/8=0.625=62.5% 13/22=about 0.59(repeats 09)=9% 22/30=about 0.73(repeats 3)=73% 12/25=0.45=45% Store 3 had the greatest percentage of smart phones. Question 2: 0.775/7.75%=0.775/0.0775=10 For mobile phone 3, it uses o.775 hour of battery life if 7.75% of battery is used.