Toán Lớp 6: A flight of stairs has 12 steps. Alice can go up for 1 step or 2 steps each time. How many ways are there for Alice to go up the stairs -

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Toán Lớp 6: A flight of stairs has 12 steps. Alice can go up for 1 step or 2 steps each time. How many ways are there for Alice to go up the stairs

Nhi Tháng Tám 10, 2022 Toán học 1 Comment 0 views

Toán Lớp 6: A flight of stairs has 12 steps. Alice can go up for 1 step or 2 steps each time. How many
ways are there for Alice to go up the stairs?

Comments ( 1 )

tonhu12
10 Tháng Tám, 2022 at 7:38 chiều

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Giải đáp:

55 step distance.

Lời giải và giải thích chi tiết:

Answer: 55 step distance.

Explanation of the steps: We have:

– text{10 times 2 is 5 times Alice can have 5 ways of 2 steps}

– text{10 times 1 is 10 times that means Elice can have 10 ways of taking 1 step}

– text{Alice steps 1,2 consecutive steps, there are 40 ways of steps}

=> Alice has the following number of steps: 5 + 10 + 15 = 55(way)

Answer : 55 ways.

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