Explanation

All students must take Math.

Jake is a student.

Therefore, Jake has to take the Math class.

Explanation

Given sequence: 4, 11, 7, 14, 10, 17, __, 20

Two alternating series are used:

First series: 4 → 7 → 10 → 13 (+3 each time)

Second series: 11 → 14 → 17 → 20 (+3 each time)

Missing number: 13

Explanation

A coin has 2 possible outcomes each time:

• Head (H)
• Tail (T)

If the coin is flipped 3 times, the total possible outcomes are:

2^3 = 8 

The possible outcomes are:

HHH, HHT, HTH, HTT, THH, THT, TTH, TTT

Only one outcome gives 3 heads: HHH.

Therefore:

Formula

P(3 heads)=Favourable outcomes​/Total outcome=1/8

1/8=0.125 or 12.5%

Explanation

Let the number be x.

3% of x = 60

3/100 x X = 60

X= 60 x 1000/3

$$x = frac{60 times 100}{3}$$ x=2000​

Explanation

Each group moves one letter forward, while the last letter skips one position:

Observe each position separately:

1st letters: A → B → C → D

2nd letters: B → C → D → E

3rd letters: C → D → E → F

4th letters: E → F → G → H

Therefore:

ABCE → BCDF → CDEG → DEFH