Question

Alfred is practicing typing. The first time he tested himself, he could type 45 words per minute. After practicing for a week, he could type 48 words per minute. After two weeks he could type 51 words per minute. Based on this pattern, predict how fast Alfred will be able to type after 4 weeks of practice. A. 61 words per minute   B. 57 words per minute   C. 54 words per minute   D. 51 words per minute

Answer 1

Thr pattern is 3 letters each week so I think the answer B) 57

Answer 2

option B is correct.

Alfred will be able to type after 4 week of practice is, 57 words per minute

Explanation:

As per the statement:

Alfred first time tested himself, he could type = 45 words per minute.

After the first week, he can type 48 words per minute.

After the second week, he can type 51 words per minute.

⇒ Constant ratio =
`+3 \text{words per week}`

or we can say that, Alfred is increasing his speed with 3 more words per week.

After the third week, he can type 54 words per minute.

then;

After the four week of practice, he can type 57 words per minute.