Answer:
Correct option: A -> 10/91
Step-by-step explanation:
If the password has only one number, it has three characters.
So first we can do a combination of 4 choose 3, as the characters and numbers can be at any position, then we multiply by the probability of each space having a character or number:
Combination of 4 choose 3: 4!/3! = 4
First character: 6 possibilities over a total of 16: 6/16 = 3/8
Second character: 5 possibilities over a total of 15: 5/15 = 1/3
Third character: 4 possibilities over a total of 14: 4/14 = 2/7
First number: 10 possibilities over a total of 13: 10/13
Probability: 4 * (3/8) * (1/3) * (2/7) * (10/13) = (2*5)/(7*13) = 10/91
Correct option: A
Answer: 
Step-by-step explanation: The answer simplified is 2 radical 34
Answer: a) 
b) By 0.75 square meters the new area is increased.
Step-by-step explanation:
Let the length of room be l
Let the breadth of room be 'b'
As we know the formula for "Area of rectangle ":
Now, According to question, The new area of the room is 175% of the previous area.
So, a) New area of the room becomes,
So, it means Length of the room is increased by 175%, because of which the area is increased by 175%.
b) By how many square meters has the area of Megan's room increased
<em>Answer: C</em>
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<em>It is C because when there is a line at the top of the number, it is infinite and repeats many times. That number in a shorter was can be written as a fraction over 990. Two of the answer choices has 990 in it which is letters B and C. This eliminates answer choices A and D. The number that is within the dot is your numerator (645) and 990 is your denominator. Overall the answer is 645/990</em>
Your answer to that question would be
1:10
Hope this helped!
