Consider the experiment of selecting a card from an ordinary deck of 52 playing cards and determine the probability of the stated event. A black 10 or 7 is drawn.
WOuld that be 1/26
4/52 or 1/13
I believe it is 8/52 = 2/13
Each deck has 2 black 7's and 2 black 10's. That looks like 4 cards out of 52.
To determine the probability of drawing a black 10 or 7 from a deck of 52 playing cards, you first need to calculate the number of favorable outcomes (the number of black 10s or black 7s) and the number of possible outcomes (the total number of cards).
There are two black 10s in a deck of cards (10 of spades and 10 of clubs) and two black 7s in a deck of cards (7 of spades and 7 of clubs). Therefore, there are a total of 4 favorable outcomes.
Since there are 52 cards in a deck, the total number of possible outcomes is 52.
Now, divide the number of favorable outcomes (4) by the number of possible outcomes (52) to find the probability:
Probability = Favorable outcomes / Total outcomes
= 4 / 52
= 1 / 13
So, the probability of drawing a black 10 or 7 from a deck of 52 playing cards is 1/13, not 1/26.