Answer:
15 marks
Step-by-step explanation:
If the average mark obtained by 3 students is 15, then the total marks are
⇒ 3 x 15 = 45
Let x be the marks obtained by the third student.
If two students obtained 12 and 18 marks, then
⇒ 12 + 18 + x = 45
⇒ 30 + x = 45
⇒ x = 45 - 30
⇒ x = 15
Answer:
b
Step-by-step explanation:
Answer:
To entertain
Step-by-step explanation:
Because the dad made a joke to entertain, and the story is entertaining the readers.
Answer:
65.17°
Step-by-step explanation:
→ Inverse cosine -0.42
65.17°
→ As the domain is between 0 and 360, any negative values can be ignored