40. In a box there are 10 T-shirts,
15 long sleeves shirts and 2.5
gowns. If one attire is picked at
random, what is the probability
that the attire is either a T-shirt
or a gown?
A. 7/11
B. 11/23
C. 7/100
D. 7/10
41. Calculate the force actin
g on a 5 kg object if its acceleration is 4 m/s^2.
A. 20 N
B. 4 N
C. 9 N
D. 1 N
Step 1: Determine the number of T-shirts, long sleeves shirts, and gowns.
Given:
Number of T-shirts = 10
Number of long sleeves shirts = 15
Number of gowns = 2.5
Step 2: Convert the number of gowns to a whole number.
Since it's not possible to have a fraction of a gown, we can assume that 2.5 gowns refers to 2 gowns.
Therefore, the number of gowns = 2.
Step 3: Calculate the total number of attires.
Total number of attires = Number of T-shirts + Number of long sleeves shirts + Number of gowns
Total number of attires = 10 + 15 + 2 = 27
Step 4: Calculate the probability of picking either a T-shirt or a gown.
Probability = (Number of T-shirts + Number of gowns) / Total number of attires
Probability = (10 + 2) / 27
Probability = 12 / 27
Step 5: Simplify the probability.
Probability = 4/9
Therefore, the probability that the attire picked is either a T-shirt or a gown is 4/9.
Answer: There is no option given in the question, but the correct probability is 4/9.