Answer:
After 12 days pizza and tacos will be served on the same day.
Explanation:
Since pizza is served in the school cafeteria every fourth school day.
And on every 3rd school day Tacos are being served.
If both are served today then we have to find the number of days after which both will be served on the same day again.
To solve these kind of questions we should take the LCM of both the digits.
LCM of 4 and 3 = 4×3 = 12
Therefore, after 12 days both will be served on the same day.