You have a 3x3 NumPy array arr and want to add scalar 10 to only the second row using broadcasting. Which code achieves this correctly?

hard📝 Application Q8 of 15

NumPy - Broadcasting

You have a 3x3 NumPy array arr and want to add scalar 10 to only the second row using broadcasting. Which code achieves this correctly?

Aarr[1] = arr[1] + 10

Barr + 10

Carr[:, 1] + 10

Darr[1, :] + 10

Step-by-Step Solution

Solution:

Step 1: Understand row selection and broadcasting
To add 10 only to second row, select row 1 and add scalar 10.
Step 2: Check options for correct syntax
arr[1] = arr[1] + 10 correctly updates second row in place. arr + 10 adds to whole array, A adds to second column, D computes but does not assign.
Final Answer:
arr[1] = arr[1] + 10 -> Option A
Quick Check:
Assign after adding scalar to selected row [OK]

Quick Trick: Select row, add scalar, assign back to update [OK]

Common Mistakes:

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