<mat-carousel timings="200ms ease-in" [autoplay]="true" interval="3000">
<mat-carousel-slide *ngFor="let slide of slides; let i = index" [image]="slide.image"
overlayColor="#ffffff" [hideOverlay]="false">
</mat-carousel-slide>
interval="3000" is throwing error 'string' is not assignable to type 'number'.