Explanation

We are given:

• 27 bicycles passed the lights test.
• 21 bicycles passed the brakes test.
• 1 bicycle failed both tests.
• There are 30 bicycles in total.

Let:

• $L$ be the set of bicycles that passed the lights test.
• $B$ be the set of bicycles that passed the brakes test.

We need to find how many bicycles passed both tests, which is the intersection of sets $L$a nd $B$, or $L cap B$.

The formula for the union of two sets is:

$$|L\cup B|=|L|+|B|-|L\cap B|$$

We know:

• $|L cup B| = 30 - 1 = 29$ (since 1 bicycle failed both tests).
• $|L|=27$
• $|B| = 21$

Substitute the values into the formula:

$$29 = 27 + 21 - |L cap B|$$ $$29 = 48 - |L cap B|$$ $$|L cap B| = 48 - 29 = 19$$

Explanation

Explanation

Explanation

A scientific theory is a well-substantiated explanation of some aspect of the natural world

Both scientific laws and scientific theories are typically well-supported by observations and/or experimental evidence. 

Additional Information:

Explanation

We are given four words:

1. Apparent
2. Apostate
3. Appoint
4. Apparel

Let's arrange them in the order they appear in a dictionary:

• First, compare the first letter of each word (all start with "A").
• Next, compare the second letters:
  • "p" (for "Apparent", "Appoint", "Apparel", "Apostate")
  • Then, compare the third letter:
    • "p" (Apparent, Appoint, Apparel)
    • "o" (Apostate)
  • "Apparel" comes after "Appoint" and before "Apparent"
  • "Appoint" comes after "Apparent"

So, the correct order is:

1. Apparent
2. Apparel
3. Appoint
4. Apostate

Explanation

= (1+.1+.01+.001)

=1.111

Explanation

2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163, 167, 173, 179, 181, 191, 193, 197, 199, 211

These are the prime numbers less than 217.

The sum of these prime numbers is 4438. So, the correct answer is (D) None of these.

Explanation

Explanation

1. $$$$32−1=31

Explanation

توقیر کا متضاد تحقیر ہے